--- /dev/null
+/*
+ * 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");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff