stmmac: adding new glue driver dwmac-dwc-qos-eth (d8256121) · Commits · 戴 / test

Documentation/devicetree/bindings/net/snps,dwc-qos-ethernet.txt

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		* Synopsys DWC Ethernet QoS IP version 4.10 driver (GMAC)

		This binding is deprecated, but it continues to be supported, but new
		features should be preferably added to the stmmac binding document.

		This binding supports the Synopsys Designware Ethernet QoS (Quality Of Service)
		IP block. The IP supports multiple options for bus type, clocking and reset
		structure, and feature list. Consequently, a number of properties and list

drivers/net/ethernet/stmicro/stmmac/Kconfig

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		@@ -29,6 +29,15 @@ config STMMAC_PLATFORM

		if STMMAC_PLATFORM

		config DWMAC_DWC_QOS_ETH
		tristate "Support for snps,dwc-qos-ethernet.txt DT binding."
		select PHYLIB
		select CRC32
		select MII
		depends on OF && HAS_DMA
		help
		Support for chips using the snps,dwc-qos-ethernet.txt DT binding.

		config DWMAC_GENERIC
		tristate "Generic driver for DWMAC"
		default STMMAC_PLATFORM

drivers/net/ethernet/stmicro/stmmac/Makefile

+1 −0

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		@@ -16,6 +16,7 @@ obj-$(CONFIG_DWMAC_SOCFPGA) += dwmac-altr-socfpga.o
		obj-$(CONFIG_DWMAC_STI) += dwmac-sti.o
		obj-$(CONFIG_DWMAC_STM32) += dwmac-stm32.o
		obj-$(CONFIG_DWMAC_SUNXI) += dwmac-sunxi.o
		obj-$(CONFIG_DWMAC_DWC_QOS_ETH) += dwmac-dwc-qos-eth.o
		obj-$(CONFIG_DWMAC_GENERIC) += dwmac-generic.o
		stmmac-platform-objs:= stmmac_platform.o
		dwmac-altr-socfpga-objs := altr_tse_pcs.o dwmac-socfpga.o

drivers/net/ethernet/stmicro/stmmac/dwmac-dwc-qos-eth.c

0 → 100644

+202 −0

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		/*
		* Synopsys DWC Ethernet Quality-of-Service v4.10a linux driver
		*
		* Copyright (C) 2016 Joao Pinto <jpinto@synopsys.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/>.
		*/

		#include <linux/clk.h>
		#include <linux/clk-provider.h>
		#include <linux/device.h>
		#include <linux/ethtool.h>
		#include <linux/io.h>
		#include <linux/ioport.h>
		#include <linux/module.h>
		#include <linux/of_net.h>
		#include <linux/mfd/syscon.h>
		#include <linux/platform_device.h>
		#include <linux/stmmac.h>

		#include "stmmac_platform.h"

		static int dwc_eth_dwmac_config_dt(struct platform_device *pdev,
		struct plat_stmmacenet_data *plat_dat)
		{
		struct device_node *np = pdev->dev.of_node;
		u32 burst_map = 0;
		u32 bit_index = 0;
		u32 a_index = 0;

		if (!plat_dat->axi) {
		plat_dat->axi = kzalloc(sizeof(struct stmmac_axi), GFP_KERNEL);

		if (!plat_dat->axi)
		return -ENOMEM;
		}

		plat_dat->axi->axi_lpi_en = of_property_read_bool(np, "snps,en-lpi");
		if (of_property_read_u32(np, "snps,write-requests",
		&plat_dat->axi->axi_wr_osr_lmt)) {
		/**
		* Since the register has a reset value of 1, if property
		* is missing, default to 1.
		*/
		plat_dat->axi->axi_wr_osr_lmt = 1;
		} else {
		/**
		* If property exists, to keep the behavior from dwc_eth_qos,
		* subtract one after parsing.
		*/
		plat_dat->axi->axi_wr_osr_lmt--;
		}

		if (of_property_read_u32(np, "read,read-requests",
		&plat_dat->axi->axi_rd_osr_lmt)) {
		/**
		* Since the register has a reset value of 1, if property
		* is missing, default to 1.
		*/
		plat_dat->axi->axi_rd_osr_lmt = 1;
		} else {
		/**
		* If property exists, to keep the behavior from dwc_eth_qos,
		* subtract one after parsing.
		*/
		plat_dat->axi->axi_rd_osr_lmt--;
		}
		of_property_read_u32(np, "snps,burst-map", &burst_map);

		/* converts burst-map bitmask to burst array */
		for (bit_index = 0; bit_index < 7; bit_index++) {
		if (burst_map & (1 << bit_index)) {
		switch (bit_index) {
		case 0:
		plat_dat->axi->axi_blen[a_index] = 4; break;
		case 1:
		plat_dat->axi->axi_blen[a_index] = 8; break;
		case 2:
		plat_dat->axi->axi_blen[a_index] = 16; break;
		case 3:
		plat_dat->axi->axi_blen[a_index] = 32; break;
		case 4:
		plat_dat->axi->axi_blen[a_index] = 64; break;
		case 5:
		plat_dat->axi->axi_blen[a_index] = 128; break;
		case 6:
		plat_dat->axi->axi_blen[a_index] = 256; break;
		default:
		break;
		}
		a_index++;
		}
		}

		/* dwc-qos needs GMAC4, AAL, TSO and PMT */
		plat_dat->has_gmac4 = 1;
		plat_dat->dma_cfg->aal = 1;
		plat_dat->tso_en = 1;
		plat_dat->pmt = 1;

		return 0;
		}

		static int dwc_eth_dwmac_probe(struct platform_device *pdev)
		{
		struct plat_stmmacenet_data *plat_dat;
		struct stmmac_resources stmmac_res;
		struct resource *res;
		int ret;

		memset(&stmmac_res, 0, sizeof(struct stmmac_resources));

		/**
		* Since stmmac_platform supports name IRQ only, basic platform
		* resource initialization is done in the glue logic.
		*/
		stmmac_res.irq = platform_get_irq(pdev, 0);
		if (stmmac_res.irq < 0) {
		if (stmmac_res.irq != -EPROBE_DEFER)
		dev_err(&pdev->dev,
		"IRQ configuration information not found\n");

		return stmmac_res.irq;
		}
		stmmac_res.wol_irq = stmmac_res.irq;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		stmmac_res.addr = devm_ioremap_resource(&pdev->dev, res);
		if (IS_ERR(stmmac_res.addr))
		return PTR_ERR(stmmac_res.addr);

		plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
		if (IS_ERR(plat_dat))
		return PTR_ERR(plat_dat);

		plat_dat->stmmac_clk = devm_clk_get(&pdev->dev, "apb_pclk");
		if (IS_ERR(plat_dat->stmmac_clk)) {
		dev_err(&pdev->dev, "apb_pclk clock not found.\n");
		ret = PTR_ERR(plat_dat->stmmac_clk);
		plat_dat->stmmac_clk = NULL;
		goto err_remove_config_dt;
		}
		clk_prepare_enable(plat_dat->stmmac_clk);

		plat_dat->pclk = devm_clk_get(&pdev->dev, "phy_ref_clk");
		if (IS_ERR(plat_dat->pclk)) {
		dev_err(&pdev->dev, "phy_ref_clk clock not found.\n");
		ret = PTR_ERR(plat_dat->pclk);
		plat_dat->pclk = NULL;
		goto err_out_clk_dis_phy;
		}
		clk_prepare_enable(plat_dat->pclk);

		ret = dwc_eth_dwmac_config_dt(pdev, plat_dat);
		if (ret)
		goto err_out_clk_dis_aper;

		ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
		if (ret)
		goto err_out_clk_dis_aper;

		return 0;

		err_out_clk_dis_aper:
		clk_disable_unprepare(plat_dat->pclk);
		err_out_clk_dis_phy:
		clk_disable_unprepare(plat_dat->stmmac_clk);
		err_remove_config_dt:
		stmmac_remove_config_dt(pdev, plat_dat);

		return ret;
		}

		static int dwc_eth_dwmac_remove(struct platform_device *pdev)
		{
		return stmmac_pltfr_remove(pdev);
		}

		static const struct of_device_id dwc_eth_dwmac_match[] = {
		{ .compatible = "snps,dwc-qos-ethernet-4.10", },
		{ }
		};
		MODULE_DEVICE_TABLE(of, dwc_eth_dwmac_match);

		static struct platform_driver dwc_eth_dwmac_driver = {
		.probe = dwc_eth_dwmac_probe,
		.remove = dwc_eth_dwmac_remove,
		.driver = {
		.name = "dwc-eth-dwmac",
		.of_match_table = dwc_eth_dwmac_match,
		},
		};
		module_platform_driver(dwc_eth_dwmac_driver);

		MODULE_AUTHOR("Joao Pinto <jpinto@synopsys.com>");
		MODULE_DESCRIPTION("Synopsys DWC Ethernet Quality-of-Service v4.10a driver");
		MODULE_LICENSE("GPL v2");

drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c

+12 −3

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		@@ -180,11 +180,20 @@ static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
		mdio = false;
		}

		/* If snps,dwmac-mdio is passed from DT, always register the MDIO */
		/* exception for dwmac-dwc-qos-eth glue logic */
		if (of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
		plat->mdio_node = of_get_child_by_name(np, "mdio");
		} else {
		/**
		* If snps,dwmac-mdio is passed from DT, always register
		* the MDIO
		*/
		for_each_child_of_node(np, plat->mdio_node) {
		if (of_device_is_compatible(plat->mdio_node, "snps,dwmac-mdio"))
		if (of_device_is_compatible(plat->mdio_node,
		"snps,dwmac-mdio"))
		break;
		}
		}

		if (plat->mdio_node) {
		dev_dbg(dev, "Found MDIO subnode\n");

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