net: ethernet: bgmac: add NS2 support

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@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
index 46429402dfc1548ceb51cf4b658339167e4be3f8..6f736c19872fe304f093f47951ecfe5dd5d2e727 100644 (file)
--- 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:
+               netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
+       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 connection failed\n");
                return -ENODEV;
@@ -156,6 +199,14 @@ 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;
@@ -187,6 +238,7 @@ 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 7f66ea7638229d9396959a258d803cbef8bf4bb9..a29787fbb572bb1a104f57340209000bbdde385a 100644 (file)
--- 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 bfd9f40d71f7f55fe597aacf8846cdcee4668890..71f493f2451f7d333492965d1bc9da94a2e55695 100644 (file)
--- 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;