Commit 4bd3bb7b authored by Samin Guo's avatar Samin Guo Committed by Paolo Abeni

net: stmmac: Add glue layer for StarFive JH7110 SoC

This adds StarFive dwmac driver support on the StarFive JH7110 SoC.
Tested-by: default avatarTommaso Merciai <tomm.merciai@gmail.com>
Co-developed-by: default avatarEmil Renner Berthing <kernel@esmil.dk>
Signed-off-by: default avatarEmil Renner Berthing <kernel@esmil.dk>
Signed-off-by: default avatarSamin Guo <samin.guo@starfivetech.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
parent b76eaf7d
......@@ -19933,6 +19933,7 @@ M: Emil Renner Berthing <kernel@esmil.dk>
M: Samin Guo <samin.guo@starfivetech.com>
S: Maintained
F: Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
F: drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
STARFIVE JH7100 CLOCK DRIVERS
M: Emil Renner Berthing <kernel@esmil.dk>
......
......@@ -165,6 +165,18 @@ config DWMAC_SOCFPGA
for the stmmac device driver. This driver is used for
arria5 and cyclone5 FPGA SoCs.
config DWMAC_STARFIVE
tristate "StarFive dwmac support"
depends on OF && (ARCH_STARFIVE || COMPILE_TEST)
select MFD_SYSCON
default m if ARCH_STARFIVE
help
Support for ethernet controllers on StarFive RISC-V SoCs
This selects the StarFive platform specific glue layer support for
the stmmac device driver. This driver is used for StarFive JH7110
ethernet controller.
config DWMAC_STI
tristate "STi GMAC support"
default ARCH_STI
......
......@@ -23,6 +23,7 @@ obj-$(CONFIG_DWMAC_OXNAS) += dwmac-oxnas.o
obj-$(CONFIG_DWMAC_QCOM_ETHQOS) += dwmac-qcom-ethqos.o
obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
obj-$(CONFIG_DWMAC_STARFIVE) += dwmac-starfive.o
obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o
obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o
......
// SPDX-License-Identifier: GPL-2.0+
/*
* StarFive DWMAC platform driver
*
* Copyright (C) 2021 Emil Renner Berthing <kernel@esmil.dk>
* Copyright (C) 2022 StarFive Technology Co., Ltd.
*
*/
#include <linux/mfd/syscon.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include "stmmac_platform.h"
struct starfive_dwmac {
struct device *dev;
struct clk *clk_tx;
};
static void starfive_dwmac_fix_mac_speed(void *priv, unsigned int speed)
{
struct starfive_dwmac *dwmac = priv;
unsigned long rate;
int err;
rate = clk_get_rate(dwmac->clk_tx);
switch (speed) {
case SPEED_1000:
rate = 125000000;
break;
case SPEED_100:
rate = 25000000;
break;
case SPEED_10:
rate = 2500000;
break;
default:
dev_err(dwmac->dev, "invalid speed %u\n", speed);
break;
}
err = clk_set_rate(dwmac->clk_tx, rate);
if (err)
dev_err(dwmac->dev, "failed to set tx rate %lu\n", rate);
}
static int starfive_dwmac_probe(struct platform_device *pdev)
{
struct plat_stmmacenet_data *plat_dat;
struct stmmac_resources stmmac_res;
struct starfive_dwmac *dwmac;
struct clk *clk_gtx;
int err;
err = stmmac_get_platform_resources(pdev, &stmmac_res);
if (err)
return dev_err_probe(&pdev->dev, err,
"failed to get resources\n");
plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
if (IS_ERR(plat_dat))
return dev_err_probe(&pdev->dev, PTR_ERR(plat_dat),
"dt configuration failed\n");
dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
if (!dwmac)
return -ENOMEM;
dwmac->clk_tx = devm_clk_get_enabled(&pdev->dev, "tx");
if (IS_ERR(dwmac->clk_tx))
return dev_err_probe(&pdev->dev, PTR_ERR(dwmac->clk_tx),
"error getting tx clock\n");
clk_gtx = devm_clk_get_enabled(&pdev->dev, "gtx");
if (IS_ERR(clk_gtx))
return dev_err_probe(&pdev->dev, PTR_ERR(clk_gtx),
"error getting gtx clock\n");
/* Generally, the rgmii_tx clock is provided by the internal clock,
* which needs to match the corresponding clock frequency according
* to different speeds. If the rgmii_tx clock is provided by the
* external rgmii_rxin, there is no need to configure the clock
* internally, because rgmii_rxin will be adaptively adjusted.
*/
if (!device_property_read_bool(&pdev->dev, "starfive,tx-use-rgmii-clk"))
plat_dat->fix_mac_speed = starfive_dwmac_fix_mac_speed;
dwmac->dev = &pdev->dev;
plat_dat->bsp_priv = dwmac;
plat_dat->dma_cfg->dche = true;
err = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
if (err) {
stmmac_remove_config_dt(pdev, plat_dat);
return err;
}
return 0;
}
static const struct of_device_id starfive_dwmac_match[] = {
{ .compatible = "starfive,jh7110-dwmac" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, starfive_dwmac_match);
static struct platform_driver starfive_dwmac_driver = {
.probe = starfive_dwmac_probe,
.remove = stmmac_pltfr_remove,
.driver = {
.name = "starfive-dwmac",
.pm = &stmmac_pltfr_pm_ops,
.of_match_table = starfive_dwmac_match,
},
};
module_platform_driver(starfive_dwmac_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("StarFive DWMAC platform driver");
MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
MODULE_AUTHOR("Samin Guo <samin.guo@starfivetech.com>");
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