From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- drivers/net/ethernet/broadcom/bgmac-platform.c | 303 +++++++++++++++++++++++++ 1 file changed, 303 insertions(+) create mode 100644 drivers/net/ethernet/broadcom/bgmac-platform.c (limited to 'drivers/net/ethernet/broadcom/bgmac-platform.c') diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c new file mode 100644 index 000000000..b4381cd41 --- /dev/null +++ b/drivers/net/ethernet/broadcom/bgmac-platform.c @@ -0,0 +1,303 @@ +/* + * 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 +#include +#include +#include +#include +#include +#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"); + fallthrough; + 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; + int ret; + + 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; + + ret = of_get_ethdev_address(np, bgmac->net_dev); + if (ret == -EPROBE_DEFER) + return ret; + + if (ret) + dev_warn(&pdev->dev, + "MAC address not present in device tree\n"); + + bgmac->irq = platform_get_irq(pdev, 0); + if (bgmac->irq < 0) + return bgmac->irq; + + bgmac->plat.base = + devm_platform_ioremap_resource_byname(pdev, "amac_base"); + if (IS_ERR(bgmac->plat.base)) + return PTR_ERR(bgmac->plat.base); + + /* The idm_base resource is optional for some platforms */ + 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; + } + + /* The nicpm_base resource is optional for some platforms */ + 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"); -- cgit v1.2.3