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/*
* 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");
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 void bgmac_remove(struct platform_device *pdev)
{
struct bgmac *bgmac = platform_get_drvdata(pdev);
bgmac_enet_remove(bgmac);
}
#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_new = bgmac_remove,
};
module_platform_driver(bgmac_enet_driver);
MODULE_DESCRIPTION("Broadcom iProc GBit platform interface driver");
MODULE_LICENSE("GPL");
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