Initial import

1 files changed, 458 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
new file mode 100644
index 000000000..68aec5c46
--- /dev/null
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -0,0 +1,458 @@
+/*******************************************************************************
+  This contains the functions to handle the platform driver.
+
+  Copyright (C) 2007-2011  STMicroelectronics Ltd
+
+  This program is free software; you can redistribute it and/or modify it
+  under the terms and conditions of the GNU General Public License,
+  version 2, as published by the Free Software Foundation.
+
+  This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
+  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+
+  The full GNU General Public License is included in this distribution in
+  the file called "COPYING".
+
+  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+*******************************************************************************/
+
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_net.h>
+#include <linux/of_device.h>
+
+#include "stmmac.h"
+#include "stmmac_platform.h"
+
+static const struct of_device_id stmmac_dt_ids[] = {
+	/* SoC specific glue layers should come before generic bindings */
+	{ .compatible = "rockchip,rk3288-gmac", .data = &rk3288_gmac_data},
+	{ .compatible = "amlogic,meson6-dwmac", .data = &meson6_dwmac_data},
+	{ .compatible = "allwinner,sun7i-a20-gmac", .data = &sun7i_gmac_data},
+	{ .compatible = "st,stih415-dwmac", .data = &stih4xx_dwmac_data},
+	{ .compatible = "st,stih416-dwmac", .data = &stih4xx_dwmac_data},
+	{ .compatible = "st,stid127-dwmac", .data = &stid127_dwmac_data},
+	{ .compatible = "st,stih407-dwmac", .data = &stih4xx_dwmac_data},
+	{ .compatible = "altr,socfpga-stmmac", .data = &socfpga_gmac_data },
+	{ .compatible = "st,spear600-gmac"},
+	{ .compatible = "snps,dwmac-3.610"},
+	{ .compatible = "snps,dwmac-3.70a"},
+	{ .compatible = "snps,dwmac-3.710"},
+	{ .compatible = "snps,dwmac"},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, stmmac_dt_ids);
+
+#ifdef CONFIG_OF
+
+/**
+ * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
+ * @mcast_bins: Multicast filtering bins
+ * Description:
+ * this function validates the number of Multicast filtering bins specified
+ * by the configuration through the device tree. The Synopsys GMAC supports
+ * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
+ * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
+ * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
+ * invalid and will cause the filtering algorithm to use Multicast
+ * promiscuous mode.
+ */
+static int dwmac1000_validate_mcast_bins(int mcast_bins)
+{
+	int x = mcast_bins;
+
+	switch (x) {
+	case HASH_TABLE_SIZE:
+	case 128:
+	case 256:
+		break;
+	default:
+		x = 0;
+		pr_info("Hash table entries set to unexpected value %d",
+			mcast_bins);
+		break;
+	}
+	return x;
+}
+
+/**
+ * dwmac1000_validate_ucast_entries - validate the Unicast address entries
+ * @ucast_entries: number of Unicast address entries
+ * Description:
+ * This function validates the number of Unicast address entries supported
+ * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
+ * supports 1, 32, 64, or 128 Unicast filter entries for it's Unicast filter
+ * logic. This function validates a valid, supported configuration is
+ * selected, and defaults to 1 Unicast address if an unsupported
+ * configuration is selected.
+ */
+static int dwmac1000_validate_ucast_entries(int ucast_entries)
+{
+	int x = ucast_entries;
+
+	switch (x) {
+	case 1:
+	case 32:
+	case 64:
+	case 128:
+		break;
+	default:
+		x = 1;
+		pr_info("Unicast table entries set to unexpected value %d\n",
+			ucast_entries);
+		break;
+	}
+	return x;
+}
+
+/**
+ * stmmac_probe_config_dt - parse device-tree driver parameters
+ * @pdev: platform_device structure
+ * @plat: driver data platform structure
+ * @mac: MAC address to use
+ * Description:
+ * this function is to read the driver parameters from device-tree and
+ * set some private fields that will be used by the main at runtime.
+ */
+static int stmmac_probe_config_dt(struct platform_device *pdev,
+				  struct plat_stmmacenet_data *plat,
+				  const char **mac)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct stmmac_dma_cfg *dma_cfg;
+	const struct of_device_id *device;
+
+	if (!np)
+		return -ENODEV;
+
+	device = of_match_device(stmmac_dt_ids, &pdev->dev);
+	if (!device)
+		return -ENODEV;
+
+	if (device->data) {
+		const struct stmmac_of_data *data = device->data;
+		plat->has_gmac = data->has_gmac;
+		plat->enh_desc = data->enh_desc;
+		plat->tx_coe = data->tx_coe;
+		plat->rx_coe = data->rx_coe;
+		plat->bugged_jumbo = data->bugged_jumbo;
+		plat->pmt = data->pmt;
+		plat->riwt_off = data->riwt_off;
+		plat->fix_mac_speed = data->fix_mac_speed;
+		plat->bus_setup = data->bus_setup;
+		plat->setup = data->setup;
+		plat->free = data->free;
+		plat->init = data->init;
+		plat->exit = data->exit;
+	}
+
+	*mac = of_get_mac_address(np);
+	plat->interface = of_get_phy_mode(np);
+
+	/* Get max speed of operation from device tree */
+	if (of_property_read_u32(np, "max-speed", &plat->max_speed))
+		plat->max_speed = -1;
+
+	plat->bus_id = of_alias_get_id(np, "ethernet");
+	if (plat->bus_id < 0)
+		plat->bus_id = 0;
+
+	/* Default to phy auto-detection */
+	plat->phy_addr = -1;
+
+	/* "snps,phy-addr" is not a standard property. Mark it as deprecated
+	 * and warn of its use. Remove this when phy node support is added.
+	 */
+	if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
+		dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
+
+	if (plat->phy_bus_name)
+		plat->mdio_bus_data = NULL;
+	else
+		plat->mdio_bus_data =
+			devm_kzalloc(&pdev->dev,
+				     sizeof(struct stmmac_mdio_bus_data),
+				     GFP_KERNEL);
+
+	of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
+
+	of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
+
+	plat->force_sf_dma_mode =
+		of_property_read_bool(np, "snps,force_sf_dma_mode");
+
+	/* Set the maxmtu to a default of JUMBO_LEN in case the
+	 * parameter is not present in the device tree.
+	 */
+	plat->maxmtu = JUMBO_LEN;
+
+	/*
+	 * Currently only the properties needed on SPEAr600
+	 * are provided. All other properties should be added
+	 * once needed on other platforms.
+	 */
+	if (of_device_is_compatible(np, "st,spear600-gmac") ||
+		of_device_is_compatible(np, "snps,dwmac-3.70a") ||
+		of_device_is_compatible(np, "snps,dwmac")) {
+		/* Note that the max-frame-size parameter as defined in the
+		 * ePAPR v1.1 spec is defined as max-frame-size, it's
+		 * actually used as the IEEE definition of MAC Client
+		 * data, or MTU. The ePAPR specification is confusing as
+		 * the definition is max-frame-size, but usage examples
+		 * are clearly MTUs
+		 */
+		of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
+		of_property_read_u32(np, "snps,multicast-filter-bins",
+				     &plat->multicast_filter_bins);
+		of_property_read_u32(np, "snps,perfect-filter-entries",
+				     &plat->unicast_filter_entries);
+		plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
+					       plat->unicast_filter_entries);
+		plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
+					      plat->multicast_filter_bins);
+		plat->has_gmac = 1;
+		plat->pmt = 1;
+	}
+
+	if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
+		of_device_is_compatible(np, "snps,dwmac-3.710")) {
+		plat->enh_desc = 1;
+		plat->bugged_jumbo = 1;
+		plat->force_sf_dma_mode = 1;
+	}
+
+	if (of_find_property(np, "snps,pbl", NULL)) {
+		dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
+				       GFP_KERNEL);
+		if (!dma_cfg)
+			return -ENOMEM;
+		plat->dma_cfg = dma_cfg;
+		of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
+		dma_cfg->fixed_burst =
+			of_property_read_bool(np, "snps,fixed-burst");
+		dma_cfg->mixed_burst =
+			of_property_read_bool(np, "snps,mixed-burst");
+		of_property_read_u32(np, "snps,burst_len", &dma_cfg->burst_len);
+		if (dma_cfg->burst_len < 0 || dma_cfg->burst_len > 256)
+			dma_cfg->burst_len = 0;
+	}
+	plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
+	if (plat->force_thresh_dma_mode) {
+		plat->force_sf_dma_mode = 0;
+		pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set.");
+	}
+
+	return 0;
+}
+#else
+static int stmmac_probe_config_dt(struct platform_device *pdev,
+				  struct plat_stmmacenet_data *plat,
+				  const char **mac)
+{
+	return -ENOSYS;
+}
+#endif /* CONFIG_OF */
+
+/**
+ * stmmac_pltfr_probe - platform driver probe.
+ * @pdev: platform device pointer
+ * Description: platform_device probe function. It is to allocate
+ * the necessary platform resources, invoke custom helper (if required) and
+ * invoke the main probe function.
+ */
+static int stmmac_pltfr_probe(struct platform_device *pdev)
+{
+	int ret = 0;
+	struct resource *res;
+	struct device *dev = &pdev->dev;
+	void __iomem *addr = NULL;
+	struct stmmac_priv *priv = NULL;
+	struct plat_stmmacenet_data *plat_dat = NULL;
+	const char *mac = NULL;
+	int irq, wol_irq, lpi_irq;
+
+	/* Get IRQ information early to have an ability to ask for deferred
+	 * probe if needed before we went too far with resource allocation.
+	 */
+	irq = platform_get_irq_byname(pdev, "macirq");
+	if (irq < 0) {
+		if (irq != -EPROBE_DEFER) {
+			dev_err(dev,
+				"MAC IRQ configuration information not found\n");
+		}
+		return irq;
+	}
+
+	/* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
+	 * The external wake up irq can be passed through the platform code
+	 * named as "eth_wake_irq"
+	 *
+	 * In case the wake up interrupt is not passed from the platform
+	 * so the driver will continue to use the mac irq (ndev->irq)
+	 */
+	wol_irq = platform_get_irq_byname(pdev, "eth_wake_irq");
+	if (wol_irq < 0) {
+		if (wol_irq == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+		wol_irq = irq;
+	}
+
+	lpi_irq = platform_get_irq_byname(pdev, "eth_lpi");
+	if (lpi_irq == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(addr))
+		return PTR_ERR(addr);
+
+	plat_dat = dev_get_platdata(&pdev->dev);
+
+	if (!plat_dat)
+		plat_dat = devm_kzalloc(&pdev->dev,
+					sizeof(struct plat_stmmacenet_data),
+					GFP_KERNEL);
+	if (!plat_dat) {
+		pr_err("%s: ERROR: no memory", __func__);
+		return  -ENOMEM;
+	}
+
+	/* Set default value for multicast hash bins */
+	plat_dat->multicast_filter_bins = HASH_TABLE_SIZE;
+
+	/* Set default value for unicast filter entries */
+	plat_dat->unicast_filter_entries = 1;
+
+	if (pdev->dev.of_node) {
+		ret = stmmac_probe_config_dt(pdev, plat_dat, &mac);
+		if (ret) {
+			pr_err("%s: main dt probe failed", __func__);
+			return ret;
+		}
+	}
+
+	/* Custom setup (if needed) */
+	if (plat_dat->setup) {
+		plat_dat->bsp_priv = plat_dat->setup(pdev);
+		if (IS_ERR(plat_dat->bsp_priv))
+			return PTR_ERR(plat_dat->bsp_priv);
+	}
+
+	/* Custom initialisation (if needed)*/
+	if (plat_dat->init) {
+		ret = plat_dat->init(pdev, plat_dat->bsp_priv);
+		if (unlikely(ret))
+			return ret;
+	}
+
+	priv = stmmac_dvr_probe(&(pdev->dev), plat_dat, addr);
+	if (IS_ERR(priv)) {
+		pr_err("%s: main driver probe failed", __func__);
+		return PTR_ERR(priv);
+	}
+
+	/* Copy IRQ values to priv structure which is now avaialble */
+	priv->dev->irq = irq;
+	priv->wol_irq = wol_irq;
+	priv->lpi_irq = lpi_irq;
+
+	/* Get MAC address if available (DT) */
+	if (mac)
+		memcpy(priv->dev->dev_addr, mac, ETH_ALEN);
+
+	platform_set_drvdata(pdev, priv->dev);
+
+	pr_debug("STMMAC platform driver registration completed");
+
+	return 0;
+}
+
+/**
+ * stmmac_pltfr_remove
+ * @pdev: platform device pointer
+ * Description: this function calls the main to free the net resources
+ * and calls the platforms hook and release the resources (e.g. mem).
+ */
+static int stmmac_pltfr_remove(struct platform_device *pdev)
+{
+	struct net_device *ndev = platform_get_drvdata(pdev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	int ret = stmmac_dvr_remove(ndev);
+
+	if (priv->plat->exit)
+		priv->plat->exit(pdev, priv->plat->bsp_priv);
+
+	if (priv->plat->free)
+		priv->plat->free(pdev, priv->plat->bsp_priv);
+
+	return ret;
+}
+
+#ifdef CONFIG_PM_SLEEP
+/**
+ * stmmac_pltfr_suspend
+ * @dev: device pointer
+ * Description: this function is invoked when suspend the driver and it direcly
+ * call the main suspend function and then, if required, on some platform, it
+ * can call an exit helper.
+ */
+static int stmmac_pltfr_suspend(struct device *dev)
+{
+	int ret;
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct platform_device *pdev = to_platform_device(dev);
+
+	ret = stmmac_suspend(ndev);
+	if (priv->plat->exit)
+		priv->plat->exit(pdev, priv->plat->bsp_priv);
+
+	return ret;
+}
+
+/**
+ * stmmac_pltfr_resume
+ * @dev: device pointer
+ * Description: this function is invoked when resume the driver before calling
+ * the main resume function, on some platforms, it can call own init helper
+ * if required.
+ */
+static int stmmac_pltfr_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+	struct platform_device *pdev = to_platform_device(dev);
+
+	if (priv->plat->init)
+		priv->plat->init(pdev, priv->plat->bsp_priv);
+
+	return stmmac_resume(ndev);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static SIMPLE_DEV_PM_OPS(stmmac_pltfr_pm_ops,
+			 stmmac_pltfr_suspend, stmmac_pltfr_resume);
+
+static struct platform_driver stmmac_pltfr_driver = {
+	.probe = stmmac_pltfr_probe,
+	.remove = stmmac_pltfr_remove,
+	.driver = {
+		   .name = STMMAC_RESOURCE_NAME,
+		   .pm = &stmmac_pltfr_pm_ops,
+		   .of_match_table = of_match_ptr(stmmac_dt_ids),
+	},
+};
+
+module_platform_driver(stmmac_pltfr_driver);
+
+MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PLATFORM driver");
+MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
+MODULE_LICENSE("GPL");