oxnas: move gmac soc glue from mach to stmmac driver

[openwrt.git] / target / linux / oxnas / files / drivers / net / ethernet / stmicro / stmmac / dwmac-oxnas.c

diff --git a/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c b/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
new file mode 100644 (file)
index 0000000..07f9f44
--- /dev/null
+++ b/target/linux/oxnas/files/drivers/net/ethernet/stmicro/stmmac/dwmac-oxnas.c
@@ -0,0 +1,172 @@
+/* Copyright OpenWrt.org (C) 2015.
+ * Copyright Altera Corporation (C) 2014. All rights reserved.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Adopted from dwmac-socfpga.c
+ * Based on code found in mach-oxnas.c
+ */
+
+#include <linux/mfd/syscon.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_net.h>
+#include <linux/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/stmmac.h>
+#include <linux/version.h>
+
+#include <mach/hardware.h>
+
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+struct oxnas_gmac {
+       struct clk *clk;
+};
+
+static int oxnas_gmac_init(struct platform_device *pdev, void *priv)
+{
+       struct oxnas_gmac *bsp_priv = priv;
+       int ret = 0;
+       unsigned value;
+
+       ret = device_reset(&pdev->dev);
+       if (ret)
+               return ret;
+
+       if (IS_ERR(bsp_priv->clk))
+               return PTR_ERR(bsp_priv->clk);
+       clk_prepare_enable(bsp_priv->clk);
+
+       value = readl(SYS_CTRL_GMAC_CTRL);
+
+       /* Enable GMII_GTXCLK to follow GMII_REFCLK, required for gigabit PHY */
+       value |= BIT(SYS_CTRL_GMAC_CKEN_GTX);
+       /* Use simple mux for 25/125 Mhz clock switching */
+       value |= BIT(SYS_CTRL_GMAC_SIMPLE_MUX);
+       /* set auto switch tx clock source */
+       value |= BIT(SYS_CTRL_GMAC_AUTO_TX_SOURCE);
+       /* enable tx & rx vardelay */
+       value |= BIT(SYS_CTRL_GMAC_CKEN_TX_OUT);
+       value |= BIT(SYS_CTRL_GMAC_CKEN_TXN_OUT);
+       value |= BIT(SYS_CTRL_GMAC_CKEN_TX_IN);
+       value |= BIT(SYS_CTRL_GMAC_CKEN_RX_OUT);
+       value |= BIT(SYS_CTRL_GMAC_CKEN_RXN_OUT);
+       value |= BIT(SYS_CTRL_GMAC_CKEN_RX_IN);
+       writel(value, SYS_CTRL_GMAC_CTRL);
+
+       /* set tx & rx vardelay */
+       value = 0;
+       value |= SYS_CTRL_GMAC_TX_VARDELAY(4);
+       value |= SYS_CTRL_GMAC_TXN_VARDELAY(2);
+       value |= SYS_CTRL_GMAC_RX_VARDELAY(10);
+       value |= SYS_CTRL_GMAC_RXN_VARDELAY(8);
+       writel(value, SYS_CTRL_GMAC_DELAY_CTRL);
+
+       return 0;
+}
+
+static void oxnas_gmac_exit(struct platform_device *pdev, void *priv)
+{
+       struct reset_control *rstc;
+
+       clk_disable_unprepare(priv);
+       devm_clk_put(&pdev->dev, priv);
+
+       rstc = reset_control_get(&pdev->dev, NULL);
+       if (!IS_ERR(rstc)) {
+               reset_control_assert(rstc);
+               reset_control_put(rstc);
+       }
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+static void *oxnas_gmac_probe(struct platform_device *pdev)
+{
+#else
+static int oxnas_gmac_probe(struct platform_device *pdev)
+{
+       struct plat_stmmacenet_data *plat_dat;
+       struct stmmac_resources stmmac_res;
+       int                     ret;
+#endif
+       struct device           *dev = &pdev->dev;
+       struct oxnas_gmac       *bsp_priv;
+
+       bsp_priv = devm_kzalloc(dev, sizeof(*bsp_priv), GFP_KERNEL);
+       if (!bsp_priv)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+               return ERR_PTR(-ENOMEM);
+#else
+               return -ENOMEM;
+#endif
+       bsp_priv->clk = devm_clk_get(dev, "gmac");
+       if (IS_ERR(bsp_priv->clk))
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+               return bsp_priv->clk;
+#else
+               return PTR_ERR(bsp_priv->clk);
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+       return bsp_priv;
+#else
+       ret = stmmac_get_platform_resources(pdev, &stmmac_res);
+       if (ret)
+               return ret;
+
+       plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
+       if (IS_ERR(plat_dat))
+               return PTR_ERR(plat_dat);
+
+       plat_dat->bsp_priv = bsp_priv;
+       plat_dat->init = oxnas_gmac_init;
+       plat_dat->exit = oxnas_gmac_exit;
+
+       ret = oxnas_gmac_init(pdev, bsp_priv);
+       if (ret)
+               return ret;
+
+       return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
+#endif
+}
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4,2,0)
+const struct stmmac_of_data oxnas_gmac_data = {
+       .has_gmac = 1,
+       .setup = oxnas_gmac_probe,
+       .init = oxnas_gmac_init,
+       .exit = oxnas_gmac_exit,
+};
+#else
+static const struct of_device_id oxnas_gmac_match[] = {
+       { .compatible = "plxtech,nas782x-gmac" },
+       { }
+};
+MODULE_DEVICE_TABLE(of, oxnas_gmac_match);
+
+static struct platform_driver oxnas_gmac_driver = {
+       .probe  = oxnas_gmac_probe,
+       .remove = stmmac_pltfr_remove,
+       .driver = {
+               .name           = "oxnas-gmac",
+               .pm             = &stmmac_pltfr_pm_ops,
+               .of_match_table = oxnas_gmac_match,
+       },
+};
+module_platform_driver(oxnas_gmac_driver);
+#endif
+
+MODULE_LICENSE("GPL v2");