cpsw-phy-sel.rar_Texas_cpsw

/* Texas Instruments Ethernet Switch Driver * * Copyright (C) 2013 Texas Instruments * * 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 "as is" WITHOUT ANY WARRANTY of any * kind, whether express or implied; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/platform_device.h> #include <linux/module.h> #include <linux/netdevice.h> #include <linux/phy.h> #include <linux/of.h> #include <linux/of_device.h> #include "cpsw.h" /* AM33xx SoC specific definitions for the CONTROL port */ #define AM33XX_GMII_SEL_MODE_MII 0 #define AM33XX_GMII_SEL_MODE_RMII 1 #define AM33XX_GMII_SEL_MODE_RGMII 2 #define AM33XX_GMII_SEL_RMII2_IO_CLK_EN BIT(7) #define AM33XX_GMII_SEL_RMII1_IO_CLK_EN BIT(6) #define GMII_SEL_MODE_MASK 0x3 struct cpsw_phy_sel_priv { struct device *dev; u32 __iomem *gmii_sel; bool rmii_clock_external; void (*cpsw_phy_sel)(struct cpsw_phy_sel_priv *priv, phy_interface_t phy_mode, int slave); }; static void cpsw_gmii_sel_am3352(struct cpsw_phy_sel_priv *priv, phy_interface_t phy_mode, int slave) { u32 reg; u32 mask; u32 mode = 0; reg = readl(priv->gmii_sel); switch (phy_mode) { case PHY_INTERFACE_MODE_RMII: mode = AM33XX_GMII_SEL_MODE_RMII; break; case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_RGMII_ID: case PHY_INTERFACE_MODE_RGMII_RXID: case PHY_INTERFACE_MODE_RGMII_TXID: mode = AM33XX_GMII_SEL_MODE_RGMII; break; case PHY_INTERFACE_MODE_MII: default: mode = AM33XX_GMII_SEL_MODE_MII; break; }; mask = GMII_SEL_MODE_MASK << (slave * 2) | BIT(slave + 6); mode <<= slave * 2; if (priv->rmii_clock_external) { if (slave == 0) mode |= AM33XX_GMII_SEL_RMII1_IO_CLK_EN; else mode |= AM33XX_GMII_SEL_RMII2_IO_CLK_EN; } reg &= ~mask; reg |= mode; writel(reg, priv->gmii_sel); } static void cpsw_gmii_sel_dra7xx(struct cpsw_phy_sel_priv *priv, phy_interface_t phy_mode, int slave) { u32 reg; u32 mask; u32 mode = 0; reg = readl(priv->gmii_sel); switch (phy_mode) { case PHY_INTERFACE_MODE_RMII: mode = AM33XX_GMII_SEL_MODE_RMII; break; case PHY_INTERFACE_MODE_RGMII: case PHY_INTERFACE_MODE_RGMII_ID: case PHY_INTERFACE_MODE_RGMII_RXID: case PHY_INTERFACE_MODE_RGMII_TXID: mode = AM33XX_GMII_SEL_MODE_RGMII; break; case PHY_INTERFACE_MODE_MII: default: mode = AM33XX_GMII_SEL_MODE_MII; break; }; switch (slave) { case 0: mask = GMII_SEL_MODE_MASK; break; case 1: mask = GMII_SEL_MODE_MASK << 4; mode <<= 4; break; default: dev_err(priv->dev, "invalid slave number...\n"); return; } if (priv->rmii_clock_external) dev_err(priv->dev, "RMII External clock is not supported\n"); reg &= ~mask; reg |= mode; writel(reg, priv->gmii_sel); } static struct platform_driver cpsw_phy_sel_driver; static int match(struct device *dev, void *data) { struct device_node *node = (struct device_node *)data; return dev->of_node == node && dev->driver == &cpsw_phy_sel_driver.driver; } void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave) { struct device_node *node; struct cpsw_phy_sel_priv *priv; node = of_get_child_by_name(dev->of_node, "cpsw-phy-sel"); if (!node) { dev_err(dev, "Phy mode driver DT not found\n"); return; } dev = bus_find_device(&platform_bus_type, NULL, node, match); priv = dev_get_drvdata(dev); priv->cpsw_phy_sel(priv, phy_mode, slave); } EXPORT_SYMBOL_GPL(cpsw_phy_sel); static const struct of_device_id cpsw_phy_sel_id_table[] = { { .compatible = "ti,am3352-cpsw-phy-sel", .data = &cpsw_gmii_sel_am3352, }, { .compatible = "ti,dra7xx-cpsw-phy-sel", .data = &cpsw_gmii_sel_dra7xx, }, { .compatible = "ti,am43xx-cpsw-phy-sel", .data = &cpsw_gmii_sel_am3352, }, {} }; MODULE_DEVICE_TABLE(of, cpsw_phy_sel_id_table); static int cpsw_phy_sel_probe(struct platform_device *pdev) { struct resource *res; const struct of_device_id *of_id; struct cpsw_phy_sel_priv *priv; of_id = of_match_node(cpsw_phy_sel_id_table, pdev->dev.of_node); if (!of_id) return -EINVAL; priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); if (!priv) { dev_err(&pdev->dev, "unable to alloc memory for cpsw phy sel\n"); return -ENOMEM; } priv->dev = &pdev->dev; priv->cpsw_phy_sel = of_id->data; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gmii-sel"); priv->gmii_sel = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->gmii_sel)) return PTR_ERR(priv->gmii_sel); if (of_find_property(pdev->dev.of_node, "rmii-clock-ext", NULL)) priv->rmii_clock_external = true; dev_set_drvdata(&pdev->dev, priv); return 0; } static struct platform_driver cpsw_phy_sel_driver = { .probe = cpsw_phy_sel_probe, .driver = { .name = "cpsw-phy-sel", .of_match_table = cpsw_phy_sel_id_table, }, }; module_platform_driver(cpsw_phy_sel_driver); MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>"); MODULE_LICENSE("GPL v2");