1 /* Texas Instruments Ethernet Switch Driver
3 * Copyright (C) 2013 Texas Instruments
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * version 2 as published by the Free Software Foundation.
9 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
10 * kind, whether express or implied; without even the implied warranty
11 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
15 #include <linux/platform_device.h>
16 #include <linux/module.h>
17 #include <linux/netdevice.h>
18 #include <linux/phy.h>
20 #include <linux/of_device.h>
24 /* AM33xx SoC specific definitions for the CONTROL port */
25 #define AM33XX_GMII_SEL_MODE_MII 0
26 #define AM33XX_GMII_SEL_MODE_RMII 1
27 #define AM33XX_GMII_SEL_MODE_RGMII 2
29 #define AM33XX_GMII_SEL_RMII2_IO_CLK_EN BIT(7)
30 #define AM33XX_GMII_SEL_RMII1_IO_CLK_EN BIT(6)
32 #define GMII_SEL_MODE_MASK 0x3
34 struct cpsw_phy_sel_priv {
36 u32 __iomem *gmii_sel;
37 bool rmii_clock_external;
38 void (*cpsw_phy_sel)(struct cpsw_phy_sel_priv *priv,
39 phy_interface_t phy_mode, int slave);
43 static void cpsw_gmii_sel_am3352(struct cpsw_phy_sel_priv *priv,
44 phy_interface_t phy_mode, int slave)
50 reg = readl(priv->gmii_sel);
53 case PHY_INTERFACE_MODE_RMII:
54 mode = AM33XX_GMII_SEL_MODE_RMII;
57 case PHY_INTERFACE_MODE_RGMII:
58 case PHY_INTERFACE_MODE_RGMII_ID:
59 case PHY_INTERFACE_MODE_RGMII_RXID:
60 case PHY_INTERFACE_MODE_RGMII_TXID:
61 mode = AM33XX_GMII_SEL_MODE_RGMII;
64 case PHY_INTERFACE_MODE_MII:
66 mode = AM33XX_GMII_SEL_MODE_MII;
70 mask = GMII_SEL_MODE_MASK << (slave * 2) | BIT(slave + 6);
73 if (priv->rmii_clock_external) {
75 mode |= AM33XX_GMII_SEL_RMII1_IO_CLK_EN;
77 mode |= AM33XX_GMII_SEL_RMII2_IO_CLK_EN;
83 writel(reg, priv->gmii_sel);
86 static void cpsw_gmii_sel_dra7xx(struct cpsw_phy_sel_priv *priv,
87 phy_interface_t phy_mode, int slave)
93 reg = readl(priv->gmii_sel);
96 case PHY_INTERFACE_MODE_RMII:
97 mode = AM33XX_GMII_SEL_MODE_RMII;
100 case PHY_INTERFACE_MODE_RGMII:
101 case PHY_INTERFACE_MODE_RGMII_ID:
102 case PHY_INTERFACE_MODE_RGMII_RXID:
103 case PHY_INTERFACE_MODE_RGMII_TXID:
104 mode = AM33XX_GMII_SEL_MODE_RGMII;
107 case PHY_INTERFACE_MODE_MII:
109 mode = AM33XX_GMII_SEL_MODE_MII;
115 mask = GMII_SEL_MODE_MASK;
118 mask = GMII_SEL_MODE_MASK << 4;
122 dev_err(priv->dev, "invalid slave number...\n");
126 if (priv->rmii_clock_external)
127 dev_err(priv->dev, "RMII External clock is not supported\n");
132 writel(reg, priv->gmii_sel);
135 static struct platform_driver cpsw_phy_sel_driver;
136 static int match(struct device *dev, void *data)
138 struct device_node *node = (struct device_node *)data;
139 return dev->of_node == node &&
140 dev->driver == &cpsw_phy_sel_driver.driver;
143 void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave)
145 struct device_node *node;
146 struct cpsw_phy_sel_priv *priv;
148 node = of_get_child_by_name(dev->of_node, "cpsw-phy-sel");
150 dev_err(dev, "Phy mode driver DT not found\n");
154 dev = bus_find_device(&platform_bus_type, NULL, node, match);
155 priv = dev_get_drvdata(dev);
157 priv->cpsw_phy_sel(priv, phy_mode, slave);
159 EXPORT_SYMBOL_GPL(cpsw_phy_sel);
161 static const struct of_device_id cpsw_phy_sel_id_table[] = {
163 .compatible = "ti,am3352-cpsw-phy-sel",
164 .data = &cpsw_gmii_sel_am3352,
167 .compatible = "ti,dra7xx-cpsw-phy-sel",
168 .data = &cpsw_gmii_sel_dra7xx,
171 .compatible = "ti,am43xx-cpsw-phy-sel",
172 .data = &cpsw_gmii_sel_am3352,
176 MODULE_DEVICE_TABLE(of, cpsw_phy_sel_id_table);
178 static int cpsw_phy_sel_probe(struct platform_device *pdev)
180 struct resource *res;
181 const struct of_device_id *of_id;
182 struct cpsw_phy_sel_priv *priv;
184 of_id = of_match_node(cpsw_phy_sel_id_table, pdev->dev.of_node);
188 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
190 dev_err(&pdev->dev, "unable to alloc memory for cpsw phy sel\n");
194 priv->dev = &pdev->dev;
195 priv->cpsw_phy_sel = of_id->data;
197 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gmii-sel");
198 priv->gmii_sel = devm_ioremap_resource(&pdev->dev, res);
199 if (IS_ERR(priv->gmii_sel))
200 return PTR_ERR(priv->gmii_sel);
202 if (of_find_property(pdev->dev.of_node, "rmii-clock-ext", NULL))
203 priv->rmii_clock_external = true;
205 dev_set_drvdata(&pdev->dev, priv);
210 static struct platform_driver cpsw_phy_sel_driver = {
211 .probe = cpsw_phy_sel_probe,
213 .name = "cpsw-phy-sel",
214 .of_match_table = cpsw_phy_sel_id_table,
218 module_platform_driver(cpsw_phy_sel_driver);
219 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
220 MODULE_LICENSE("GPL v2");