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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | /* 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) 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 = 0x3 << (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 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, }, {} }; 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->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", .owner = THIS_MODULE, .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"); |