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Beniamino Galvani says: ==================== net: stmmac glue layer for Amlogic Meson SoCs the Ethernet controller available in Amlogic Meson6 and Meson8 SoCs is a Synopsys DesignWare MAC IP core, already supported by the stmmac driver. These patches add a glue layer to the driver for the platform-specific settings required by the Amlogic variant. This has been tested on a Amlogic S802 device with the initial Meson support submitted by Carlo Caione [1]. [1] http://lwn.net/Articles/612000/ ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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* Amlogic Meson DWMAC Ethernet controller | ||
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The device inherits all the properties of the dwmac/stmmac devices | ||
described in the file net/stmmac.txt with the following changes. | ||
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Required properties: | ||
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- compatible: should be "amlogic,meson6-dwmac" along with "snps,dwmac" | ||
and any applicable more detailed version number | ||
described in net/stmmac.txt | ||
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- reg: should contain a register range for the dwmac controller and | ||
another one for the Amlogic specific configuration | ||
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Example: | ||
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ethmac: ethernet@c9410000 { | ||
compatible = "amlogic,meson6-dwmac", "snps,dwmac"; | ||
reg = <0xc9410000 0x10000 | ||
0xc1108108 0x4>; | ||
interrupts = <0 8 1>; | ||
interrupt-names = "macirq"; | ||
clocks = <&clk81>; | ||
clock-names = "stmmaceth"; | ||
} |
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/* | ||
* Amlogic Meson DWMAC glue layer | ||
* | ||
* Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com> | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License version 2 as | ||
* published by the Free Software Foundation. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
*/ | ||
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#include <linux/device.h> | ||
#include <linux/ethtool.h> | ||
#include <linux/io.h> | ||
#include <linux/ioport.h> | ||
#include <linux/platform_device.h> | ||
#include <linux/stmmac.h> | ||
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#define ETHMAC_SPEED_100 BIT(1) | ||
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struct meson_dwmac { | ||
struct device *dev; | ||
void __iomem *reg; | ||
}; | ||
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static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed) | ||
{ | ||
struct meson_dwmac *dwmac = priv; | ||
unsigned int val; | ||
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val = readl(dwmac->reg); | ||
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switch (speed) { | ||
case SPEED_10: | ||
val &= ~ETHMAC_SPEED_100; | ||
break; | ||
case SPEED_100: | ||
val |= ETHMAC_SPEED_100; | ||
break; | ||
} | ||
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writel(val, dwmac->reg); | ||
} | ||
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static void *meson6_dwmac_setup(struct platform_device *pdev) | ||
{ | ||
struct meson_dwmac *dwmac; | ||
struct resource *res; | ||
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dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL); | ||
if (!dwmac) | ||
return ERR_PTR(-ENOMEM); | ||
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res = platform_get_resource(pdev, IORESOURCE_MEM, 1); | ||
dwmac->reg = devm_ioremap_resource(&pdev->dev, res); | ||
if (IS_ERR(dwmac->reg)) | ||
return dwmac->reg; | ||
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return dwmac; | ||
} | ||
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const struct stmmac_of_data meson6_dwmac_data = { | ||
.setup = meson6_dwmac_setup, | ||
.fix_mac_speed = meson6_dwmac_fix_mac_speed, | ||
}; |
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