Re: [PATCH 4/5] net: ethernet: bgmac: add NS2 support
From: Florian Fainelli <hidden>
Date: 2016-10-26 21:50:47
Also in:
linux-arm-kernel, lkml, netdev
On 10/26/2016 12:36 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, the bgmac_chip_reset() was intentionally removed to prevent the resetting of the chip to the default values on open. Finally, clearing of the pending interrupts on init is required due to observed issues on some platforms. Signed-off-by: Jon Mason <jon.mason-dY08KVG/lbpWk0Htik3J/w@public.gmane.org> ---
+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");
+ 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);
+
+ usleep_range(10, 100);Does not seem like a good idea, do you need that sleep?
quoted hunk ↗ jump to hunk
+ + 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; } + if (bgmac->feature_flags & BGMAC_FEAT_LANE_SWAP) + phy_dev->dev_flags |= PHY_BRCM_EXP_LANE_SWAP; + return 0; }@@ -140,6 +188,9 @@ static int bgmac_probe(struct platform_device *pdev) platform_set_drvdata(pdev, bgmac); + if (of_property_read_bool(np, "brcm,enet-phy-lane-swap")) + bgmac->feature_flags |= BGMAC_FEAT_LANE_SWAP; + /* Set the features of the 4707 family */ bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST; bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;@@ -182,6 +233,14 @@ 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 +272,7 @@ 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 38876ec..1796208 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);@@ -1158,8 +1161,6 @@ static int bgmac_open(struct net_device *net_dev) struct bgmac *bgmac = netdev_priv(net_dev); int err = 0; - bgmac_chip_reset(bgmac); -
Is this removal intentional? Maybe it should be special cased with checking for a NS2 BGMAC instance and not do it in that case? -- Florian -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html