1 // SPDX-License-Identifier: GPL-2.0-only
3 * phy-da8xx-usb - TI DaVinci DA8xx USB PHY driver
5 * Copyright (C) 2016 David Lechner <david@lechnology.com>
11 #include <linux/mfd/da8xx-cfgchip.h>
12 #include <linux/mfd/syscon.h>
13 #include <linux/module.h>
14 #include <linux/phy/phy.h>
15 #include <linux/platform_data/phy-da8xx-usb.h>
16 #include <linux/platform_device.h>
17 #include <linux/regmap.h>
19 #define PHY_INIT_BITS (CFGCHIP2_SESENDEN | CFGCHIP2_VBDTCTEN)
21 struct da8xx_usb_phy {
22 struct phy_provider *phy_provider;
23 struct phy *usb11_phy;
24 struct phy *usb20_phy;
25 struct clk *usb11_clk;
26 struct clk *usb20_clk;
27 struct regmap *regmap;
30 static int da8xx_usb11_phy_power_on(struct phy *phy)
32 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
35 ret = clk_prepare_enable(d_phy->usb11_clk);
39 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM,
40 CFGCHIP2_USB1SUSPENDM);
45 static int da8xx_usb11_phy_power_off(struct phy *phy)
47 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
49 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_USB1SUSPENDM, 0);
51 clk_disable_unprepare(d_phy->usb11_clk);
56 static const struct phy_ops da8xx_usb11_phy_ops = {
57 .power_on = da8xx_usb11_phy_power_on,
58 .power_off = da8xx_usb11_phy_power_off,
62 static int da8xx_usb20_phy_power_on(struct phy *phy)
64 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
67 ret = clk_prepare_enable(d_phy->usb20_clk);
71 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN, 0);
76 static int da8xx_usb20_phy_power_off(struct phy *phy)
78 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
80 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGPWRDN,
83 clk_disable_unprepare(d_phy->usb20_clk);
88 static int da8xx_usb20_phy_set_mode(struct phy *phy,
89 enum phy_mode mode, int submode)
91 struct da8xx_usb_phy *d_phy = phy_get_drvdata(phy);
95 case PHY_MODE_USB_HOST: /* Force VBUS valid, ID = 0 */
96 val = CFGCHIP2_OTGMODE_FORCE_HOST;
98 case PHY_MODE_USB_DEVICE: /* Force VBUS valid, ID = 1 */
99 val = CFGCHIP2_OTGMODE_FORCE_DEVICE;
101 case PHY_MODE_USB_OTG: /* Don't override the VBUS/ID comparators */
102 val = CFGCHIP2_OTGMODE_NO_OVERRIDE;
108 regmap_write_bits(d_phy->regmap, CFGCHIP(2), CFGCHIP2_OTGMODE_MASK,
114 static const struct phy_ops da8xx_usb20_phy_ops = {
115 .power_on = da8xx_usb20_phy_power_on,
116 .power_off = da8xx_usb20_phy_power_off,
117 .set_mode = da8xx_usb20_phy_set_mode,
118 .owner = THIS_MODULE,
121 static struct phy *da8xx_usb_phy_of_xlate(struct device *dev,
122 struct of_phandle_args *args)
124 struct da8xx_usb_phy *d_phy = dev_get_drvdata(dev);
127 return ERR_PTR(-ENODEV);
129 switch (args->args[0]) {
131 return d_phy->usb20_phy;
133 return d_phy->usb11_phy;
135 return ERR_PTR(-EINVAL);
139 static int da8xx_usb_phy_probe(struct platform_device *pdev)
141 struct device *dev = &pdev->dev;
142 struct da8xx_usb_phy_platform_data *pdata = dev->platform_data;
143 struct device_node *node = dev->of_node;
144 struct da8xx_usb_phy *d_phy;
146 d_phy = devm_kzalloc(dev, sizeof(*d_phy), GFP_KERNEL);
151 d_phy->regmap = pdata->cfgchip;
153 d_phy->regmap = syscon_regmap_lookup_by_compatible(
155 if (IS_ERR(d_phy->regmap)) {
156 dev_err(dev, "Failed to get syscon\n");
157 return PTR_ERR(d_phy->regmap);
160 d_phy->usb11_clk = devm_clk_get(dev, "usb1_clk48");
161 if (IS_ERR(d_phy->usb11_clk)) {
162 dev_err(dev, "Failed to get usb1_clk48\n");
163 return PTR_ERR(d_phy->usb11_clk);
166 d_phy->usb20_clk = devm_clk_get(dev, "usb0_clk48");
167 if (IS_ERR(d_phy->usb20_clk)) {
168 dev_err(dev, "Failed to get usb0_clk48\n");
169 return PTR_ERR(d_phy->usb20_clk);
172 d_phy->usb11_phy = devm_phy_create(dev, node, &da8xx_usb11_phy_ops);
173 if (IS_ERR(d_phy->usb11_phy)) {
174 dev_err(dev, "Failed to create usb11 phy\n");
175 return PTR_ERR(d_phy->usb11_phy);
178 d_phy->usb20_phy = devm_phy_create(dev, node, &da8xx_usb20_phy_ops);
179 if (IS_ERR(d_phy->usb20_phy)) {
180 dev_err(dev, "Failed to create usb20 phy\n");
181 return PTR_ERR(d_phy->usb20_phy);
184 platform_set_drvdata(pdev, d_phy);
185 phy_set_drvdata(d_phy->usb11_phy, d_phy);
186 phy_set_drvdata(d_phy->usb20_phy, d_phy);
189 d_phy->phy_provider = devm_of_phy_provider_register(dev,
190 da8xx_usb_phy_of_xlate);
191 if (IS_ERR(d_phy->phy_provider)) {
192 dev_err(dev, "Failed to create phy provider\n");
193 return PTR_ERR(d_phy->phy_provider);
198 ret = phy_create_lookup(d_phy->usb11_phy, "usb-phy",
201 dev_warn(dev, "Failed to create usb11 phy lookup\n");
202 ret = phy_create_lookup(d_phy->usb20_phy, "usb-phy",
205 dev_warn(dev, "Failed to create usb20 phy lookup\n");
208 regmap_write_bits(d_phy->regmap, CFGCHIP(2),
209 PHY_INIT_BITS, PHY_INIT_BITS);
214 static int da8xx_usb_phy_remove(struct platform_device *pdev)
216 struct da8xx_usb_phy *d_phy = platform_get_drvdata(pdev);
218 if (!pdev->dev.of_node) {
219 phy_remove_lookup(d_phy->usb20_phy, "usb-phy", "musb-da8xx");
220 phy_remove_lookup(d_phy->usb11_phy, "usb-phy", "ohci-da8xx");
226 static const struct of_device_id da8xx_usb_phy_ids[] = {
227 { .compatible = "ti,da830-usb-phy" },
230 MODULE_DEVICE_TABLE(of, da8xx_usb_phy_ids);
232 static struct platform_driver da8xx_usb_phy_driver = {
233 .probe = da8xx_usb_phy_probe,
234 .remove = da8xx_usb_phy_remove,
236 .name = "da8xx-usb-phy",
237 .of_match_table = da8xx_usb_phy_ids,
241 module_platform_driver(da8xx_usb_phy_driver);
243 MODULE_ALIAS("platform:da8xx-usb-phy");
244 MODULE_AUTHOR("David Lechner <david@lechnology.com>");
245 MODULE_DESCRIPTION("TI DA8xx USB PHY driver");
246 MODULE_LICENSE("GPL v2");