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stmmac: add dwmac glue for NXP 18xx/43xx family

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Add support for Ethernet on NXP LPC18xx and LPC43xx using the
dwmac driver. This glue is required to setup phy interface
mode, MII or RMII, on the SoC.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Joachim Eastwood 2015-05-14 12:10:56 +02:00 committed by David S. Miller
parent 7eafd9b400
commit d58617ea66
4 changed files with 78 additions and 1 deletions
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3
drivers/net/ethernet/stmicro/stmmac/Makefile
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@ -6,7 +6,8 @@ stmmac-objs:= stmmac_main.o stmmac_ethtool.o stmmac_mdio.o ring_mode.o \
obj-$(CONFIG_STMMAC_PLATFORM) += stmmac-platform.o
stmmac-platform-objs:= stmmac_platform.o dwmac-meson.o dwmac-sunxi.o \
dwmac-sti.o dwmac-socfpga.o dwmac-rk.o
dwmac-sti.o dwmac-socfpga.o dwmac-rk.o \
dwmac-lpc18xx.o
obj-$(CONFIG_STMMAC_PCI) += stmmac-pci.o
stmmac-pci-objs:= stmmac_pci.o

74
drivers/net/ethernet/stmicro/stmmac/dwmac-lpc18xx.c Normal file
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@ -0,0 +1,74 @@
/*
* DWMAC glue for NXP LPC18xx/LPC43xx Ethernet
*
* Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/mfd/syscon.h>
#include <linux/of.h>
#include <linux/of_net.h>
#include <linux/phy.h>
#include <linux/regmap.h>
#include <linux/stmmac.h>
/* Register defines for CREG syscon */
#define LPC18XX_CREG_CREG6 0x12c
# define LPC18XX_CREG_CREG6_ETHMODE_MASK 0x7
# define LPC18XX_CREG_CREG6_ETHMODE_MII 0x0
# define LPC18XX_CREG_CREG6_ETHMODE_RMII 0x4
struct lpc18xx_dwmac_priv_data {
struct regmap *reg;
int interface;
};
static void *lpc18xx_dwmac_setup(struct platform_device *pdev)
{
struct lpc18xx_dwmac_priv_data *dwmac;
dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
if (!dwmac)
return ERR_PTR(-ENOMEM);
dwmac->interface = of_get_phy_mode(pdev->dev.of_node);
if (dwmac->interface < 0)
return ERR_PTR(dwmac->interface);
dwmac->reg = syscon_regmap_lookup_by_compatible("nxp,lpc1850-creg");
if (IS_ERR(dwmac->reg)) {
dev_err(&pdev->dev, "Syscon lookup failed\n");
return dwmac->reg;
}
return dwmac;
}
static int lpc18xx_dwmac_init(struct platform_device *pdev, void *priv)
{
struct lpc18xx_dwmac_priv_data *dwmac = priv;
u8 ethmode;
if (dwmac->interface == PHY_INTERFACE_MODE_MII) {
ethmode = LPC18XX_CREG_CREG6_ETHMODE_MII;
} else if (dwmac->interface == PHY_INTERFACE_MODE_RMII) {
ethmode = LPC18XX_CREG_CREG6_ETHMODE_RMII;
} else {
dev_err(&pdev->dev, "Only MII and RMII mode supported\n");
return -EINVAL;
}
regmap_update_bits(dwmac->reg, LPC18XX_CREG_CREG6,
LPC18XX_CREG_CREG6_ETHMODE_MASK, ethmode);
return 0;
}
const struct stmmac_of_data lpc18xx_dwmac_data = {
.has_gmac = 1,
.setup = lpc18xx_dwmac_setup,
.init = lpc18xx_dwmac_init,
};

1
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View File

@ -37,6 +37,7 @@ static const struct of_device_id stmmac_dt_ids[] = {
{ .compatible = "rockchip,rk3288-gmac", .data = &rk3288_gmac_data},
{ .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
{ .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
{ .compatible = "nxp,lpc1850-dwmac", .data = &lpc18xx_dwmac_data},
{ .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
{ .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
{ .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},

1
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.h
View File

@ -19,6 +19,7 @@
#ifndef __STMMAC_PLATFORM_H__
#define __STMMAC_PLATFORM_H__
extern const struct stmmac_of_data lpc18xx_dwmac_data;
extern const struct stmmac_of_data meson6_dwmac_data;
extern const struct stmmac_of_data sun7i_gmac_data;
extern const struct stmmac_of_data stih4xx_dwmac_data;