net: ethernet: dwmac: add Ethernet glue logic for stm32 chip
stm324xx family chips support Synopsys MAC 3.510 IP. This patch adds settings for logical glue logic: -clocks -mode selection MII or RMII. Reviewed-by: Joachim Eastwood <manabian@gmail.com> Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com> Tested-by: Maxime Coquelin <maxime.coquelin@st.com> Signed-off-by: Alexandre TORGUE <alexandre.torgue@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>hifive-unleashed-5.1
Alexandre TORGUE
David S. Miller
parent
ce927bf174
commit
c6eec6f332
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@ -104,6 +104,18 @@ config DWMAC_STI
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device driver. This driver is used on for the STi series
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SOCs GMAC ethernet controller.
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config DWMAC_STM32
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tristate "STM32 DWMAC support"
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default ARCH_STM32
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depends on OF && HAS_IOMEM
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select MFD_SYSCON
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---help---
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Support for ethernet controller on STM32 SOCs.
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This selects STM32 SoC glue layer support for the stmmac
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device driver. This driver is used on for the STM32 series
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SOCs GMAC ethernet controller.
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config DWMAC_SUNXI
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tristate "Allwinner GMAC support"
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default ARCH_SUNXI
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@ -13,6 +13,7 @@ obj-$(CONFIG_DWMAC_MESON) += dwmac-meson.o
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obj-$(CONFIG_DWMAC_ROCKCHIP) += dwmac-rk.o
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obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
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obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o
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obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
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obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o
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obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o
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stmmac-platform-objs:= stmmac_platform.o
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@ -0,0 +1,193 @@
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/*
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* dwmac-stm32.c - DWMAC Specific Glue layer for STM32 MCU
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*
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* Copyright (C) Alexandre Torgue 2015
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* Author: Alexandre Torgue <alexandre.torgue@gmail.com>
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* License terms: GNU General Public License (GPL), version 2
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*
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*/
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#include <linux/clk.h>
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#include <linux/kernel.h>
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#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_net.h>
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#include <linux/phy.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/stmmac.h>
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#include "stmmac_platform.h"
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#define MII_PHY_SEL_MASK BIT(23)
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struct stm32_dwmac {
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struct clk *clk_tx;
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struct clk *clk_rx;
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u32 mode_reg; /* MAC glue-logic mode register */
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struct regmap *regmap;
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u32 speed;
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};
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static int stm32_dwmac_init(struct plat_stmmacenet_data *plat_dat)
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{
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struct stm32_dwmac *dwmac = plat_dat->bsp_priv;
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u32 reg = dwmac->mode_reg;
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u32 val;
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int ret;
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val = (plat_dat->interface == PHY_INTERFACE_MODE_MII) ? 0 : 1;
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ret = regmap_update_bits(dwmac->regmap, reg, MII_PHY_SEL_MASK, val);
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if (ret)
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return ret;
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ret = clk_prepare_enable(dwmac->clk_tx);
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if (ret)
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return ret;
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ret = clk_prepare_enable(dwmac->clk_rx);
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if (ret)
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clk_disable_unprepare(dwmac->clk_tx);
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return ret;
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}
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static void stm32_dwmac_clk_disable(struct stm32_dwmac *dwmac)
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{
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clk_disable_unprepare(dwmac->clk_tx);
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clk_disable_unprepare(dwmac->clk_rx);
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}
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static int stm32_dwmac_parse_data(struct stm32_dwmac *dwmac,
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struct device *dev)
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{
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struct device_node *np = dev->of_node;
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int err;
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/* Get TX/RX clocks */
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dwmac->clk_tx = devm_clk_get(dev, "mac-clk-tx");
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if (IS_ERR(dwmac->clk_tx)) {
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dev_err(dev, "No tx clock provided...\n");
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return PTR_ERR(dwmac->clk_tx);
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}
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dwmac->clk_rx = devm_clk_get(dev, "mac-clk-rx");
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if (IS_ERR(dwmac->clk_rx)) {
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dev_err(dev, "No rx clock provided...\n");
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return PTR_ERR(dwmac->clk_rx);
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}
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/* Get mode register */
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dwmac->regmap = syscon_regmap_lookup_by_phandle(np, "st,syscon");
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if (IS_ERR(dwmac->regmap))
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return PTR_ERR(dwmac->regmap);
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err = of_property_read_u32_index(np, "st,syscon", 1, &dwmac->mode_reg);
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if (err)
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dev_err(dev, "Can't get sysconfig mode offset (%d)\n", err);
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return err;
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}
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static int stm32_dwmac_probe(struct platform_device *pdev)
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{
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struct plat_stmmacenet_data *plat_dat;
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struct stmmac_resources stmmac_res;
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struct stm32_dwmac *dwmac;
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int ret;
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ret = stmmac_get_platform_resources(pdev, &stmmac_res);
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if (ret)
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return ret;
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plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
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if (IS_ERR(plat_dat))
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return PTR_ERR(plat_dat);
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dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
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if (!dwmac)
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return -ENOMEM;
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ret = stm32_dwmac_parse_data(dwmac, &pdev->dev);
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if (ret) {
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dev_err(&pdev->dev, "Unable to parse OF data\n");
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return ret;
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}
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plat_dat->bsp_priv = dwmac;
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ret = stm32_dwmac_init(plat_dat);
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if (ret)
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return ret;
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ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
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if (ret)
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stm32_dwmac_clk_disable(dwmac);
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return ret;
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}
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static int stm32_dwmac_remove(struct platform_device *pdev)
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{
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struct net_device *ndev = platform_get_drvdata(pdev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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int ret = stmmac_dvr_remove(&pdev->dev);
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stm32_dwmac_clk_disable(priv->plat->bsp_priv);
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return ret;
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}
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#ifdef CONFIG_PM_SLEEP
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static int stm32_dwmac_suspend(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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int ret;
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ret = stmmac_suspend(dev);
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stm32_dwmac_clk_disable(priv->plat->bsp_priv);
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return ret;
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}
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static int stm32_dwmac_resume(struct device *dev)
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{
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struct net_device *ndev = dev_get_drvdata(dev);
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struct stmmac_priv *priv = netdev_priv(ndev);
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int ret;
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ret = stm32_dwmac_init(priv->plat);
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if (ret)
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return ret;
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ret = stmmac_resume(dev);
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return ret;
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}
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#endif /* CONFIG_PM_SLEEP */
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SIMPLE_DEV_PM_OPS(stm32_dwmac_pm_ops, stm32_dwmac_suspend, stm32_dwmac_resume);
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static const struct of_device_id stm32_dwmac_match[] = {
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{ .compatible = "st,stm32-dwmac"},
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{ }
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};
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MODULE_DEVICE_TABLE(of, stm32_dwmac_match);
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static struct platform_driver stm32_dwmac_driver = {
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.probe = stm32_dwmac_probe,
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.remove = stm32_dwmac_remove,
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.driver = {
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.name = "stm32-dwmac",
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.pm = &stm32_dwmac_pm_ops,
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.of_match_table = stm32_dwmac_match,
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},
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};
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module_platform_driver(stm32_dwmac_driver);
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MODULE_AUTHOR("Alexandre Torgue <alexandre.torgue@gmail.com>");
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MODULE_DESCRIPTION("STMicroelectronics MCU DWMAC Specific Glue layer");
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MODULE_LICENSE("GPL v2");
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