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/bitops.h>
17 #include <linux/err.h>
19 #define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT BIT(0)
21 #define OMAP_DEV_PHY_PD BIT(0)
22 #define OMAP_USB2_PHY_PD BIT(28)
24 #define AM437X_USB2_PHY_PD BIT(0)
25 #define AM437X_USB2_OTG_PD BIT(1)
26 #define AM437X_USB2_OTGVDET_EN BIT(19)
27 #define AM437X_USB2_OTGSESSEND_EN BIT(20)
29 #define USB2PHY_DISCON_BYP_LATCH BIT(31)
30 #define USB2PHY_ANA_CONFIG1 (0x4c)
32 #define AM654_USB2_OTG_PD BIT(8)
33 #define AM654_USB2_VBUS_DET_EN BIT(5)
34 #define AM654_USB2_VBUSVALID_DET_EN BIT(4)
36 DECLARE_GLOBAL_DATA_PTR;
38 struct omap_usb2_phy {
39 struct regmap *pwr_regmap;
53 static const struct usb_phy_data omap5_usb2_data = {
54 .label = "omap5_usb2",
56 .mask = OMAP_DEV_PHY_PD,
57 .power_off = OMAP_DEV_PHY_PD,
60 static const struct usb_phy_data dra7x_usb2_data = {
61 .label = "dra7x_usb2",
62 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
63 .mask = OMAP_DEV_PHY_PD,
64 .power_off = OMAP_DEV_PHY_PD,
67 static const struct usb_phy_data dra7x_usb2_phy2_data = {
68 .label = "dra7x_usb2_phy2",
69 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
70 .mask = OMAP_USB2_PHY_PD,
71 .power_off = OMAP_USB2_PHY_PD,
74 static const struct usb_phy_data am437x_usb2_data = {
75 .label = "am437x_usb2",
77 .mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |
78 AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
79 .power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,
80 .power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,
83 static const struct usb_phy_data am654_usb2_data = {
84 .label = "am654_usb2",
85 .flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,
86 .mask = AM654_USB2_OTG_PD | AM654_USB2_VBUS_DET_EN |
87 AM654_USB2_VBUSVALID_DET_EN,
88 .power_on = AM654_USB2_VBUS_DET_EN | AM654_USB2_VBUSVALID_DET_EN,
89 .power_off = AM654_USB2_OTG_PD,
92 static const struct udevice_id omap_usb2_id_table[] = {
94 .compatible = "ti,omap5-usb2",
95 .data = (ulong)&omap5_usb2_data,
98 .compatible = "ti,dra7x-usb2",
99 .data = (ulong)&dra7x_usb2_data,
102 .compatible = "ti,dra7x-usb2-phy2",
103 .data = (ulong)&dra7x_usb2_phy2_data,
106 .compatible = "ti,am437x-usb2",
107 .data = (ulong)&am437x_usb2_data,
110 .compatible = "ti,am654-usb2",
111 .data = (ulong)&am654_usb2_data,
116 static int omap_usb_phy_power(struct phy *usb_phy, bool on)
118 struct udevice *dev = usb_phy->dev;
119 const struct usb_phy_data *data;
120 const struct omap_usb2_phy *phy = dev_get_priv(dev);
124 data = (const struct usb_phy_data *)dev_get_driver_data(dev);
128 rc = regmap_read(phy->pwr_regmap, phy->pwr_reg_offset, &val);
133 val |= data->power_on;
135 val |= data->power_off;
136 rc = regmap_write(phy->pwr_regmap, phy->pwr_reg_offset, val);
143 static int omap_usb2_phy_init(struct phy *usb_phy)
145 struct udevice *dev = usb_phy->dev;
146 struct omap_usb2_phy *priv = dev_get_priv(dev);
149 if (priv->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
152 * Reduce the sensitivity of internal PHY by enabling the
153 * DISCON_BYP_LATCH of the USB2PHY_ANA_CONFIG1 register. This
154 * resolves issues with certain devices which can otherwise
155 * be prone to false disconnects.
158 val = readl(priv->phy_base + USB2PHY_ANA_CONFIG1);
159 val |= USB2PHY_DISCON_BYP_LATCH;
160 writel(val, priv->phy_base + USB2PHY_ANA_CONFIG1);
166 static int omap_usb2_phy_power_on(struct phy *usb_phy)
168 return omap_usb_phy_power(usb_phy, true);
171 static int omap_usb2_phy_power_off(struct phy *usb_phy)
173 return omap_usb_phy_power(usb_phy, false);
176 static int omap_usb2_phy_exit(struct phy *usb_phy)
178 return omap_usb_phy_power(usb_phy, false);
181 struct phy_ops omap_usb2_phy_ops = {
182 .init = omap_usb2_phy_init,
183 .power_on = omap_usb2_phy_power_on,
184 .power_off = omap_usb2_phy_power_off,
185 .exit = omap_usb2_phy_exit,
188 int omap_usb2_phy_probe(struct udevice *dev)
191 struct regmap *regmap;
192 struct omap_usb2_phy *priv = dev_get_priv(dev);
193 const struct usb_phy_data *data;
196 data = (const struct usb_phy_data *)dev_get_driver_data(dev);
200 if (data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
201 priv->phy_base = dev_read_addr_ptr(dev);
205 priv->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
208 regmap = syscon_regmap_lookup_by_phandle(dev, "syscon-phy-power");
209 if (!IS_ERR(regmap)) {
210 priv->pwr_regmap = regmap;
211 rc = dev_read_u32_array(dev, "syscon-phy-power", tmp, 2);
213 printf("couldn't get power reg. offset (err %d)\n", rc);
216 priv->pwr_reg_offset = tmp[1];
219 regmap = syscon_regmap_lookup_by_phandle(dev, "ctrl-module");
220 if (!IS_ERR(regmap)) {
221 priv->pwr_regmap = regmap;
222 priv->pwr_reg_offset = 0;
226 printf("can't get regmap (err %ld)\n", PTR_ERR(regmap));
227 return PTR_ERR(regmap);
230 U_BOOT_DRIVER(omap_usb2_phy) = {
231 .name = "omap_usb2_phy",
233 .of_match = omap_usb2_id_table,
234 .probe = omap_usb2_phy_probe,
235 .ops = &omap_usb2_phy_ops,
236 .priv_auto_alloc_size = sizeof(struct omap_usb2_phy),