Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 306 insertions, 0 deletions

diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
new file mode 100644
index 000000000..894eda5b1
--- /dev/null
+++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
@@ -0,0 +1,306 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#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_PADRING_CFG		0x00000004
+#define NICPM_IOMUX_CTRL		0x00000008
+
+#define NICPM_PADRING_CFG_INIT_VAL	0x74000000
+#define NICPM_IOMUX_CTRL_INIT_VAL_AX	0x21880000
+
+#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);
+}
+
+static void platform_bgmac_write(struct bgmac *bgmac, u16 offset, u32 value)
+{
+	writel(value, bgmac->plat.base + offset);
+}
+
+static u32 platform_bgmac_idm_read(struct bgmac *bgmac, u16 offset)
+{
+	return readl(bgmac->plat.idm_base + offset);
+}
+
+static void platform_bgmac_idm_write(struct bgmac *bgmac, u16 offset, u32 value)
+{
+	writel(value, bgmac->plat.idm_base + offset);
+}
+
+static bool platform_bgmac_clk_enabled(struct bgmac *bgmac)
+{
+	if (!bgmac->plat.idm_base)
+		return true;
+
+	if ((bgmac_idm_read(bgmac, BCMA_IOCTL) & BGMAC_CLK_EN) != BGMAC_CLK_EN)
+		return false;
+	if (bgmac_idm_read(bgmac, BCMA_RESET_CTL) & BCMA_RESET_CTL_RESET)
+		return false;
+	return true;
+}
+
+static void platform_bgmac_clk_enable(struct bgmac *bgmac, u32 flags)
+{
+	u32 val;
+
+	if (!bgmac->plat.idm_base)
+		return;
+
+	/* The Reset Control register only contains a single bit to show if the
+	 * controller is currently in reset.  Do a sanity check here, just in
+	 * case the bootloader happened to leave the device in reset.
+	 */
+	val = bgmac_idm_read(bgmac, BCMA_RESET_CTL);
+	if (val) {
+		bgmac_idm_write(bgmac, BCMA_RESET_CTL, 0);
+		bgmac_idm_read(bgmac, BCMA_RESET_CTL);
+		udelay(1);
+	}
+
+	val = bgmac_idm_read(bgmac, BCMA_IOCTL);
+	/* Some bits of BCMA_IOCTL set by HW/ATF and should not change */
+	val |= flags & ~(BGMAC_AWCACHE | BGMAC_ARCACHE | BGMAC_AWUSER |
+			 BGMAC_ARUSER);
+	val |= BGMAC_CLK_EN;
+	bgmac_idm_write(bgmac, BCMA_IOCTL, val);
+	bgmac_idm_read(bgmac, BCMA_IOCTL);
+	udelay(1);
+}
+
+static void platform_bgmac_cco_ctl_maskset(struct bgmac *bgmac, u32 offset,
+					   u32 mask, u32 set)
+{
+	/* This shouldn't be encountered */
+	WARN_ON(1);
+}
+
+static u32 platform_bgmac_get_bus_clock(struct bgmac *bgmac)
+{
+	/* This shouldn't be encountered */
+	WARN_ON(1);
+
+	return 0;
+}
+
+static void platform_bgmac_cmn_maskset32(struct bgmac *bgmac, u16 offset,
+					 u32 mask, u32 set)
+{
+	/* This shouldn't be encountered */
+	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;
+
+	/* SET RGMII IO CONFIG */
+	writel(NICPM_PADRING_CFG_INIT_VAL,
+	       bgmac->plat.nicpm_base + NICPM_PADRING_CFG);
+
+	val = NICPM_IOMUX_CTRL_INIT_VAL;
+	switch (bgmac->net_dev->phydev->speed) {
+	default:
+		netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
+		/* fall through */
+	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;
+
+	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;
+	}
+
+	return 0;
+}
+
+static int bgmac_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct bgmac *bgmac;
+	struct resource *regs;
+	const u8 *mac_addr;
+
+	bgmac = bgmac_alloc(&pdev->dev);
+	if (!bgmac)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, bgmac);
+
+	/* Set the features of the 4707 family */
+	bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
+	bgmac->feature_flags |= BGMAC_FEAT_NO_RESET;
+	bgmac->feature_flags |= BGMAC_FEAT_CMDCFG_SR_REV4;
+	bgmac->feature_flags |= BGMAC_FEAT_TX_MASK_SETUP;
+	bgmac->feature_flags |= BGMAC_FEAT_RX_MASK_SETUP;
+	bgmac->feature_flags |= BGMAC_FEAT_IDM_MASK;
+
+	bgmac->dev = &pdev->dev;
+	bgmac->dma_dev = &pdev->dev;
+
+	mac_addr = of_get_mac_address(np);
+	if (mac_addr)
+		ether_addr_copy(bgmac->net_dev->dev_addr, mac_addr);
+	else
+		dev_warn(&pdev->dev, "MAC address not present in device tree\n");
+
+	bgmac->irq = platform_get_irq(pdev, 0);
+	if (bgmac->irq < 0) {
+		dev_err(&pdev->dev, "Unable to obtain IRQ\n");
+		return bgmac->irq;
+	}
+
+	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "amac_base");
+	if (!regs) {
+		dev_err(&pdev->dev, "Unable to obtain base resource\n");
+		return -EINVAL;
+	}
+
+	bgmac->plat.base = devm_ioremap_resource(&pdev->dev, regs);
+	if (IS_ERR(bgmac->plat.base))
+		return PTR_ERR(bgmac->plat.base);
+
+	regs = platform_get_resource_byname(pdev, IORESOURCE_MEM, "idm_base");
+	if (regs) {
+		bgmac->plat.idm_base = devm_ioremap_resource(&pdev->dev, regs);
+		if (IS_ERR(bgmac->plat.idm_base))
+			return PTR_ERR(bgmac->plat.idm_base);
+		bgmac->feature_flags &= ~BGMAC_FEAT_IDM_MASK;
+	}
+
+	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;
+	bgmac->idm_write = platform_bgmac_idm_write;
+	bgmac->clk_enabled = platform_bgmac_clk_enabled;
+	bgmac->clk_enable = platform_bgmac_clk_enable;
+	bgmac->cco_ctl_maskset = platform_bgmac_cco_ctl_maskset;
+	bgmac->get_bus_clock = platform_bgmac_get_bus_clock;
+	bgmac->cmn_maskset32 = platform_bgmac_cmn_maskset32;
+	if (of_parse_phandle(np, "phy-handle", 0)) {
+		bgmac->phy_connect = platform_phy_connect;
+	} else {
+		bgmac->phy_connect = bgmac_phy_connect_direct;
+		bgmac->feature_flags |= BGMAC_FEAT_FORCE_SPEED_2500;
+	}
+
+	return bgmac_enet_probe(bgmac);
+}
+
+static int bgmac_remove(struct platform_device *pdev)
+{
+	struct bgmac *bgmac = platform_get_drvdata(pdev);
+
+	bgmac_enet_remove(bgmac);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int bgmac_suspend(struct device *dev)
+{
+	struct bgmac *bgmac = dev_get_drvdata(dev);
+
+	return bgmac_enet_suspend(bgmac);
+}
+
+static int bgmac_resume(struct device *dev)
+{
+	struct bgmac *bgmac = dev_get_drvdata(dev);
+
+	return bgmac_enet_resume(bgmac);
+}
+
+static const struct dev_pm_ops bgmac_pm_ops = {
+	.suspend = bgmac_suspend,
+	.resume = bgmac_resume
+};
+
+#define BGMAC_PM_OPS (&bgmac_pm_ops)
+#else
+#define BGMAC_PM_OPS NULL
+#endif /* CONFIG_PM */
+
+static const struct of_device_id bgmac_of_enet_match[] = {
+	{.compatible = "brcm,amac",},
+	{.compatible = "brcm,nsp-amac",},
+	{.compatible = "brcm,ns2-amac",},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, bgmac_of_enet_match);
+
+static struct platform_driver bgmac_enet_driver = {
+	.driver = {
+		.name  = "bgmac-enet",
+		.of_match_table = bgmac_of_enet_match,
+		.pm = BGMAC_PM_OPS
+	},
+	.probe = bgmac_probe,
+	.remove = bgmac_remove,
+};
+
+module_platform_driver(bgmac_enet_driver);
+MODULE_LICENSE("GPL");