mirror of https://gitee.com/openkylin/linux.git
153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
/*
|
|
* Adaptrum Anarion DWMAC glue layer
|
|
*
|
|
* Copyright (C) 2017, Adaptrum, Inc.
|
|
* (Written by Alexandru Gagniuc <alex.g at adaptrum.com> for Adaptrum, Inc.)
|
|
* Licensed under the GPLv2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_net.h>
|
|
#include <linux/stmmac.h>
|
|
|
|
#include "stmmac.h"
|
|
#include "stmmac_platform.h"
|
|
|
|
#define GMAC_RESET_CONTROL_REG 0
|
|
#define GMAC_SW_CONFIG_REG 4
|
|
#define GMAC_CONFIG_INTF_SEL_MASK (0x7 << 0)
|
|
#define GMAC_CONFIG_INTF_RGMII (0x1 << 0)
|
|
|
|
struct anarion_gmac {
|
|
uintptr_t ctl_block;
|
|
uint32_t phy_intf_sel;
|
|
};
|
|
|
|
static uint32_t gmac_read_reg(struct anarion_gmac *gmac, uint8_t reg)
|
|
{
|
|
return readl((void *)(gmac->ctl_block + reg));
|
|
};
|
|
|
|
static void gmac_write_reg(struct anarion_gmac *gmac, uint8_t reg, uint32_t val)
|
|
{
|
|
writel(val, (void *)(gmac->ctl_block + reg));
|
|
}
|
|
|
|
static int anarion_gmac_init(struct platform_device *pdev, void *priv)
|
|
{
|
|
uint32_t sw_config;
|
|
struct anarion_gmac *gmac = priv;
|
|
|
|
/* Reset logic, configure interface mode, then release reset. SIMPLE! */
|
|
gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 1);
|
|
|
|
sw_config = gmac_read_reg(gmac, GMAC_SW_CONFIG_REG);
|
|
sw_config &= ~GMAC_CONFIG_INTF_SEL_MASK;
|
|
sw_config |= (gmac->phy_intf_sel & GMAC_CONFIG_INTF_SEL_MASK);
|
|
gmac_write_reg(gmac, GMAC_SW_CONFIG_REG, sw_config);
|
|
|
|
gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void anarion_gmac_exit(struct platform_device *pdev, void *priv)
|
|
{
|
|
struct anarion_gmac *gmac = priv;
|
|
|
|
gmac_write_reg(gmac, GMAC_RESET_CONTROL_REG, 1);
|
|
}
|
|
|
|
static struct anarion_gmac *anarion_config_dt(struct platform_device *pdev)
|
|
{
|
|
int phy_mode;
|
|
struct resource *res;
|
|
void __iomem *ctl_block;
|
|
struct anarion_gmac *gmac;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
ctl_block = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(ctl_block)) {
|
|
dev_err(&pdev->dev, "Cannot get reset region (%ld)!\n",
|
|
PTR_ERR(ctl_block));
|
|
return ctl_block;
|
|
}
|
|
|
|
gmac = devm_kzalloc(&pdev->dev, sizeof(*gmac), GFP_KERNEL);
|
|
if (!gmac)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
gmac->ctl_block = (uintptr_t)ctl_block;
|
|
|
|
phy_mode = of_get_phy_mode(pdev->dev.of_node);
|
|
switch (phy_mode) {
|
|
case PHY_INTERFACE_MODE_RGMII: /* Fall through */
|
|
case PHY_INTERFACE_MODE_RGMII_ID /* Fall through */:
|
|
case PHY_INTERFACE_MODE_RGMII_RXID: /* Fall through */
|
|
case PHY_INTERFACE_MODE_RGMII_TXID:
|
|
gmac->phy_intf_sel = GMAC_CONFIG_INTF_RGMII;
|
|
break;
|
|
default:
|
|
dev_err(&pdev->dev, "Unsupported phy-mode (%d)\n",
|
|
phy_mode);
|
|
return ERR_PTR(-ENOTSUPP);
|
|
}
|
|
|
|
return gmac;
|
|
}
|
|
|
|
static int anarion_dwmac_probe(struct platform_device *pdev)
|
|
{
|
|
int ret;
|
|
struct anarion_gmac *gmac;
|
|
struct plat_stmmacenet_data *plat_dat;
|
|
struct stmmac_resources stmmac_res;
|
|
|
|
ret = stmmac_get_platform_resources(pdev, &stmmac_res);
|
|
if (ret)
|
|
return ret;
|
|
|
|
gmac = anarion_config_dt(pdev);
|
|
if (IS_ERR(gmac))
|
|
return PTR_ERR(gmac);
|
|
|
|
plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
|
|
if (IS_ERR(plat_dat))
|
|
return PTR_ERR(plat_dat);
|
|
|
|
plat_dat->init = anarion_gmac_init;
|
|
plat_dat->exit = anarion_gmac_exit;
|
|
anarion_gmac_init(pdev, gmac);
|
|
plat_dat->bsp_priv = gmac;
|
|
|
|
ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
|
|
if (ret) {
|
|
stmmac_remove_config_dt(pdev, plat_dat);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id anarion_dwmac_match[] = {
|
|
{ .compatible = "adaptrum,anarion-gmac" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, anarion_dwmac_match);
|
|
|
|
static struct platform_driver anarion_dwmac_driver = {
|
|
.probe = anarion_dwmac_probe,
|
|
.remove = stmmac_pltfr_remove,
|
|
.driver = {
|
|
.name = "anarion-dwmac",
|
|
.pm = &stmmac_pltfr_pm_ops,
|
|
.of_match_table = anarion_dwmac_match,
|
|
},
|
|
};
|
|
module_platform_driver(anarion_dwmac_driver);
|
|
|
|
MODULE_DESCRIPTION("Adaptrum Anarion DWMAC specific glue layer");
|
|
MODULE_AUTHOR("Alexandru Gagniuc <mr.nuke.me@gmail.com>");
|
|
MODULE_LICENSE("GPL v2");
|