1 /* Texas Instruments Ethernet Switch Driver
3 * Copyright (C) 2013 Texas Instruments
5 * Module Author: Mugunthan V N <mugunthanvnm@ti.com>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 as published by the Free Software Foundation.
11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12 * kind, whether express or implied; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
17 #include <linux/platform_device.h>
18 #include <linux/init.h>
19 #include <linux/netdevice.h>
20 #include <linux/phy.h>
22 #include <linux/of_device.h>
26 /* AM33xx SoC specific definitions for the CONTROL port */
27 #define AM33XX_GMII_SEL_MODE_MII 0
28 #define AM33XX_GMII_SEL_MODE_RMII 1
29 #define AM33XX_GMII_SEL_MODE_RGMII 2
31 #define AM33XX_GMII_SEL_RMII2_IO_CLK_EN BIT(7)
32 #define AM33XX_GMII_SEL_RMII1_IO_CLK_EN BIT(6)
34 #define GMII_SEL_MODE_MASK 0x3
36 struct cpsw_phy_sel_priv {
38 u32 __iomem *gmii_sel;
39 bool rmii_clock_external;
40 void (*cpsw_phy_sel)(struct cpsw_phy_sel_priv *priv,
41 phy_interface_t phy_mode, int slave);
45 static void cpsw_gmii_sel_am3352(struct cpsw_phy_sel_priv *priv,
46 phy_interface_t phy_mode, int slave)
52 reg = readl(priv->gmii_sel);
55 case PHY_INTERFACE_MODE_RMII:
56 mode = AM33XX_GMII_SEL_MODE_RMII;
59 case PHY_INTERFACE_MODE_RGMII:
60 case PHY_INTERFACE_MODE_RGMII_ID:
61 case PHY_INTERFACE_MODE_RGMII_RXID:
62 case PHY_INTERFACE_MODE_RGMII_TXID:
63 mode = AM33XX_GMII_SEL_MODE_RGMII;
66 case PHY_INTERFACE_MODE_MII:
68 mode = AM33XX_GMII_SEL_MODE_MII;
72 mask = GMII_SEL_MODE_MASK << (slave * 2) | BIT(slave + 6);
75 if (priv->rmii_clock_external) {
77 mode |= AM33XX_GMII_SEL_RMII1_IO_CLK_EN;
79 mode |= AM33XX_GMII_SEL_RMII2_IO_CLK_EN;
85 writel(reg, priv->gmii_sel);
88 static void cpsw_gmii_sel_dra7xx(struct cpsw_phy_sel_priv *priv,
89 phy_interface_t phy_mode, int slave)
95 reg = readl(priv->gmii_sel);
98 case PHY_INTERFACE_MODE_RMII:
99 mode = AM33XX_GMII_SEL_MODE_RMII;
102 case PHY_INTERFACE_MODE_RGMII:
103 case PHY_INTERFACE_MODE_RGMII_ID:
104 case PHY_INTERFACE_MODE_RGMII_RXID:
105 case PHY_INTERFACE_MODE_RGMII_TXID:
106 mode = AM33XX_GMII_SEL_MODE_RGMII;
109 case PHY_INTERFACE_MODE_MII:
111 mode = AM33XX_GMII_SEL_MODE_MII;
117 mask = GMII_SEL_MODE_MASK;
120 mask = GMII_SEL_MODE_MASK << 4;
124 dev_err(priv->dev, "invalid slave number...\n");
128 if (priv->rmii_clock_external)
129 dev_err(priv->dev, "RMII External clock is not supported\n");
134 writel(reg, priv->gmii_sel);
137 static struct platform_driver cpsw_phy_sel_driver;
138 static int match(struct device *dev, void *data)
140 struct device_node *node = (struct device_node *)data;
141 return dev->of_node == node &&
142 dev->driver == &cpsw_phy_sel_driver.driver;
145 void cpsw_phy_sel(struct device *dev, phy_interface_t phy_mode, int slave)
147 struct device_node *node;
148 struct cpsw_phy_sel_priv *priv;
150 node = of_get_child_by_name(dev->of_node, "cpsw-phy-sel");
152 dev_err(dev, "Phy mode driver DT not found\n");
156 dev = bus_find_device(&platform_bus_type, NULL, node, match);
157 priv = dev_get_drvdata(dev);
159 priv->cpsw_phy_sel(priv, phy_mode, slave);
161 EXPORT_SYMBOL_GPL(cpsw_phy_sel);
163 static const struct of_device_id cpsw_phy_sel_id_table[] = {
165 .compatible = "ti,am3352-cpsw-phy-sel",
166 .data = &cpsw_gmii_sel_am3352,
169 .compatible = "ti,dra7xx-cpsw-phy-sel",
170 .data = &cpsw_gmii_sel_dra7xx,
173 .compatible = "ti,am43xx-cpsw-phy-sel",
174 .data = &cpsw_gmii_sel_am3352,
179 static int cpsw_phy_sel_probe(struct platform_device *pdev)
181 struct resource *res;
182 const struct of_device_id *of_id;
183 struct cpsw_phy_sel_priv *priv;
185 of_id = of_match_node(cpsw_phy_sel_id_table, pdev->dev.of_node);
189 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
191 dev_err(&pdev->dev, "unable to alloc memory for cpsw phy sel\n");
195 priv->dev = &pdev->dev;
196 priv->cpsw_phy_sel = of_id->data;
198 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "gmii-sel");
199 priv->gmii_sel = devm_ioremap_resource(&pdev->dev, res);
200 if (IS_ERR(priv->gmii_sel))
201 return PTR_ERR(priv->gmii_sel);
203 if (of_find_property(pdev->dev.of_node, "rmii-clock-ext", NULL))
204 priv->rmii_clock_external = true;
206 dev_set_drvdata(&pdev->dev, priv);
211 static struct platform_driver cpsw_phy_sel_driver = {
212 .probe = cpsw_phy_sel_probe,
214 .name = "cpsw-phy-sel",
215 .of_match_table = cpsw_phy_sel_id_table,
218 builtin_platform_driver(cpsw_phy_sel_driver);