1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
6 * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
13 #include <generic-phy.h>
16 #include <linux/err.h>
18 #define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT BIT(0)
20 #define OMAP_DEV_PHY_PD BIT(0)
21 #define OMAP_USB2_PHY_PD BIT(28)
23 #define AM437X_USB2_PHY_PD BIT(0)
24 #define AM437X_USB2_OTG_PD BIT(1)
25 #define AM437X_USB2_OTGVDET_EN BIT(19)
26 #define AM437X_USB2_OTGSESSEND_EN BIT(20)
28 #define USB2PHY_DISCON_BYP_LATCH BIT(31)
29 #define USB2PHY_ANA_CONFIG1 (0x4c)
31 #define AM654_USB2_OTG_PD BIT(8)
32 #define AM654_USB2_VBUS_DET_EN BIT(5)
33 #define AM654_USB2_VBUSVALID_DET_EN BIT(4)
35 DECLARE_GLOBAL_DATA_PTR;
37 struct omap_usb2_phy {
38 struct regmap *pwr_regmap;
52 static const struct usb_phy_data omap5_usb2_data = {
53 .label = "omap5_usb2",
55 .mask = OMAP_DEV_PHY_PD,
56 .power_off = OMAP_DEV_PHY_PD,
59 static const struct usb_phy_data dra7x_usb2_data = {
60 .label = "dra7x_usb2",
61 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
62 .mask = OMAP_DEV_PHY_PD,
63 .power_off = OMAP_DEV_PHY_PD,
66 static const struct usb_phy_data dra7x_usb2_phy2_data = {
67 .label = "dra7x_usb2_phy2",
68 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
69 .mask = OMAP_USB2_PHY_PD,
70 .power_off = OMAP_USB2_PHY_PD,
73 static const struct usb_phy_data am437x_usb2_data = {
74 .label = "am437x_usb2",
76 .mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |
77 AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
78 .power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
79 .power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
82 static const struct usb_phy_data am654_usb2_data = {
83 .label = "am654_usb2",
84 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
85 .mask = AM654_USB2_OTG_PD | AM654_USB2_VBUS_DET_EN |
86 AM654_USB2_VBUSVALID_DET_EN,
87 .power_on = AM654_USB2_VBUS_DET_EN | AM654_USB2_VBUSVALID_DET_EN,
88 .power_off = AM654_USB2_OTG_PD,
91 static const struct udevice_id omap_usb2_id_table[] = {
93 .compatible = "ti,omap5-usb2",
94 .data = (ulong)&omap5_usb2_data,
97 .compatible = "ti,dra7x-usb2",
98 .data = (ulong)&dra7x_usb2_data,
101 .compatible = "ti,dra7x-usb2-phy2",
102 .data = (ulong)&dra7x_usb2_phy2_data,
105 .compatible = "ti,am437x-usb2",
106 .data = (ulong)&am437x_usb2_data,
109 .compatible = "ti,am654-usb2",
110 .data = (ulong)&am654_usb2_data,
115 static int omap_usb_phy_power(struct phy *usb_phy, bool on)
117 struct udevice *dev = usb_phy->dev;
118 const struct usb_phy_data *data;
119 const struct omap_usb2_phy *phy = dev_get_priv(dev);
123 data = (const struct usb_phy_data *)dev_get_driver_data(dev);
127 rc = regmap_read(phy->pwr_regmap, phy->pwr_reg_offset, &val);
132 val |= data->power_on;
134 val |= data->power_off;
135 rc = regmap_write(phy->pwr_regmap, phy->pwr_reg_offset, val);
142 static int omap_usb2_phy_init(struct phy *usb_phy)
144 struct udevice *dev = usb_phy->dev;
145 struct omap_usb2_phy *priv = dev_get_priv(dev);
148 if (priv->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
151 * Reduce the sensitivity of internal PHY by enabling the
152 * DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
153 * resolves issues with certain devices which can otherwise
154 * be prone to false disconnects.
157 val = readl(priv->phy_base + USB2PHY_ANA_CONFIG1);
158 val |= USB2PHY_DISCON_BYP_LATCH;
159 writel(val, priv->phy_base + USB2PHY_ANA_CONFIG1);
165 static int omap_usb2_phy_power_on(struct phy *usb_phy)
167 return omap_usb_phy_power(usb_phy, true);
170 static int omap_usb2_phy_power_off(struct phy *usb_phy)
172 return omap_usb_phy_power(usb_phy, false);
175 static int omap_usb2_phy_exit(struct phy *usb_phy)
177 return omap_usb_phy_power(usb_phy, false);
180 struct phy_ops omap_usb2_phy_ops = {
181 .init = omap_usb2_phy_init,
182 .power_on = omap_usb2_phy_power_on,
183 .power_off = omap_usb2_phy_power_off,
184 .exit = omap_usb2_phy_exit,
187 int omap_usb2_phy_probe(struct udevice *dev)
190 struct regmap *regmap;
191 struct omap_usb2_phy *priv = dev_get_priv(dev);
192 const struct usb_phy_data *data;
195 data = (const struct usb_phy_data *)dev_get_driver_data(dev);
199 if (data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
200 priv->phy_base = dev_read_addr_ptr(dev);
204 priv->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
207 regmap = syscon_regmap_lookup_by_phandle(dev, "syscon-phy-power");
208 if (!IS_ERR(regmap)) {
209 priv->pwr_regmap = regmap;
210 rc = dev_read_u32_array(dev, "syscon-phy-power", tmp, 2);
212 printf("couldn't get power reg. offset (err %d)\n", rc);
215 priv->pwr_reg_offset = tmp[1];
218 regmap = syscon_regmap_lookup_by_phandle(dev, "ctrl-module");
219 if (!IS_ERR(regmap)) {
220 priv->pwr_regmap = regmap;
221 priv->pwr_reg_offset = 0;
225 printf("can't get regmap (err %ld)\n", PTR_ERR(regmap));
226 return PTR_ERR(regmap);
229 U_BOOT_DRIVER(omap_usb2_phy) = {
230 .name = "omap_usb2_phy",
232 .of_match = omap_usb2_id_table,
233 .probe = omap_usb2_phy_probe,
234 .ops = &omap_usb2_phy_ops,
235 .priv_auto_alloc_size = sizeof(struct omap_usb2_phy),