[PATCH v4 6/7] net: ethernet: bgmac: add NS2 support

[Scott Branden]

One change in this patch

On 16-11-01 01:04 PM, Jon Mason wrote:
> Add support for the variant of amac hardware present in the Broadcom
> Northstar2 based SoCs.  Northstar2 requires an additional register to be
> configured with the port speed/duplexity (NICPM).  This can be added to
> the link callback to hide it from the instances that do not use this.
> Also, clearing of the pending interrupts on init is required due to
> observed issues on some platforms.
>
> Signed-off-by: Jon Mason <jon.mason at broadcom.com>
> ---
>  drivers/net/ethernet/broadcom/bgmac-platform.c | 56 +++++++++++++++++++++++++-
>  drivers/net/ethernet/broadcom/bgmac.c          |  3 ++
>  drivers/net/ethernet/broadcom/bgmac.h          |  1 +
>  3 files changed, 58 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
> index aed5dc5..f6d48c7 100644
> --- a/drivers/net/ethernet/broadcom/bgmac-platform.c
> +++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
> @@ -14,12 +14,21 @@
>  #define pr_fmt(fmt)		KBUILD_MODNAME ": " fmt
>
>  #include <linux/bcma/bcma.h>
> +#include <linux/brcmphy.h>
>  #include <linux/etherdevice.h>
>  #include <linux/of_address.h>
>  #include <linux/of_mdio.h>
>  #include <linux/of_net.h>
>  #include "bgmac.h"
>
> +#define NICPM_IOMUX_CTRL		0x00000008
> +
> +#define NICPM_IOMUX_CTRL_INIT_VAL	0x3196e000
> +#define NICPM_IOMUX_CTRL_SPD_SHIFT	10
> +#define NICPM_IOMUX_CTRL_SPD_10M	0
> +#define NICPM_IOMUX_CTRL_SPD_100M	1
> +#define NICPM_IOMUX_CTRL_SPD_1000M	2
> +
>  static u32 platform_bgmac_read(struct bgmac *bgmac, u16 offset)
>  {
>  	return readl(bgmac->plat.base + offset);
> @@ -87,12 +96,46 @@ static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
>  	WARN_ON(1);
>  }
>
> +static void bgmac_nicpm_speed_set(struct net_device *net_dev)
> +{
> +	struct bgmac *bgmac = netdev_priv(net_dev);
> +	u32 val;
> +
> +	if (!bgmac->plat.nicpm_base)
> +		return;
> +
> +	val = NICPM_IOMUX_CTRL_INIT_VAL;
> +	switch (bgmac->net_dev->phydev->speed) {
> +	default:
> +		pr_err("Unsupported speed.  Defaulting to 1000Mb\n");
This should be dev_err
> +	case SPEED_1000:
> +		val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
> +		break;
> +	case SPEED_100:
> +		val |= NICPM_IOMUX_CTRL_SPD_100M << NICPM_IOMUX_CTRL_SPD_SHIFT;
> +		break;
> +	case SPEED_10:
> +		val |= NICPM_IOMUX_CTRL_SPD_10M << NICPM_IOMUX_CTRL_SPD_SHIFT;
> +		break;
> +	}
> +
> +	writel(val, bgmac->plat.nicpm_base + NICPM_IOMUX_CTRL);
> +
> +	bgmac_adjust_link(bgmac->net_dev);
> +}
> +
>  static int platform_phy_connect(struct bgmac *bgmac)
>  {
>  	struct phy_device *phy_dev;
>
> -	phy_dev = of_phy_get_and_connect(bgmac->net_dev, bgmac->dev->of_node,
> -					 bgmac_adjust_link);
> +	if (bgmac->plat.nicpm_base)
> +		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
> +						 bgmac->dev->of_node,
> +						 bgmac_nicpm_speed_set);
> +	else
> +		phy_dev = of_phy_get_and_connect(bgmac->net_dev,
> +						 bgmac->dev->of_node,
> +						 bgmac_adjust_link);
>  	if (!phy_dev) {
>  		dev_err(bgmac->dev, "Phy connect failed\n");
>  		return -ENODEV;
> @@ -182,6 +225,14 @@ static int bgmac_probe(struct platform_device *pdev)
>  	if (IS_ERR(bgmac->plat.idm_base))
>  		return PTR_ERR(bgmac->plat.idm_base);
>
> +	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nicpm_base");
> +	if (regs) {
> +		bgmac->plat.nicpm_base = devm_ioremap_resource(&pdev->dev,
> +							       regs);
> +		if (IS_ERR(bgmac->plat.nicpm_base))
> +			return PTR_ERR(bgmac->plat.nicpm_base);
> +	}
> +
>  	bgmac->read = platform_bgmac_read;
>  	bgmac->write = platform_bgmac_write;
>  	bgmac->idm_read = platform_bgmac_idm_read;
> @@ -213,6 +264,7 @@ static int bgmac_remove(struct platform_device *pdev)
>  static const struct of_device_id bgmac_of_enet_match[] = {
>  	{.compatible = "brcm,amac",},
>  	{.compatible = "brcm,nsp-amac",},
> +	{.compatible = "brcm,ns2-amac",},
>  	{},
>  };
>
> diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
> index 4584958..a805cc8 100644
> --- a/drivers/net/ethernet/broadcom/bgmac.c
> +++ b/drivers/net/ethernet/broadcom/bgmac.c
> @@ -1082,6 +1082,9 @@ static void bgmac_enable(struct bgmac *bgmac)
>  /* http://bcm-v4.sipsolutions.net/mac-gbit/gmac/chipinit */
>  static void bgmac_chip_init(struct bgmac *bgmac)
>  {
> +	/* Clear any erroneously pending interrupts */
> +	bgmac_write(bgmac, BGMAC_INT_STATUS, ~0);
> +
>  	/* 1 interrupt per received frame */
>  	bgmac_write(bgmac, BGMAC_INT_RECV_LAZY, 1 << BGMAC_IRL_FC_SHIFT);
>
> diff --git a/drivers/net/ethernet/broadcom/bgmac.h b/drivers/net/ethernet/broadcom/bgmac.h
> index ea52ac3..b1820ea 100644
> --- a/drivers/net/ethernet/broadcom/bgmac.h
> +++ b/drivers/net/ethernet/broadcom/bgmac.h
> @@ -463,6 +463,7 @@ struct bgmac {
>  		struct {
>  			void *base;
>  			void *idm_base;
> +			void *nicpm_base;
>  		} plat;
>  		struct {
>  			struct bcma_device *core;
>