2 * Copyright (C) 2016 Linaro Ltd
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
8 #include <linux/module.h>
9 #include <linux/ulpi/driver.h>
10 #include <linux/ulpi/regs.h>
11 #include <linux/clk.h>
12 #include <linux/regulator/consumer.h>
13 #include <linux/of_device.h>
14 #include <linux/reset.h>
15 #include <linux/extcon.h>
16 #include <linux/notifier.h>
20 #define ULPI_PWR_CLK_MNG_REG 0x88
21 # define ULPI_PWR_OTG_COMP_DISABLE BIT(0)
23 #define ULPI_MISC_A 0x96
24 # define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1)
25 # define ULPI_MISC_A_VBUSVLDEXT BIT(0)
33 struct qcom_usb_hs_phy {
37 struct clk *sleep_clk;
38 struct regulator *v1p8;
39 struct regulator *v3p3;
40 struct reset_control *reset;
41 struct ulpi_seq *init_seq;
42 struct extcon_dev *vbus_edev;
43 struct notifier_block vbus_notify;
46 static int qcom_usb_hs_phy_set_mode(struct phy *phy, enum phy_mode mode)
48 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
52 if (!uphy->vbus_edev) {
56 case PHY_MODE_USB_OTG:
57 case PHY_MODE_USB_HOST:
58 val |= ULPI_INT_IDGRD;
59 case PHY_MODE_USB_DEVICE:
60 val |= ULPI_INT_SESS_VALID;
65 ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_RISE, val);
68 ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_FALL, val);
71 case PHY_MODE_USB_OTG:
72 case PHY_MODE_USB_DEVICE:
73 addr = ULPI_SET(ULPI_MISC_A);
75 case PHY_MODE_USB_HOST:
76 addr = ULPI_CLR(ULPI_MISC_A);
82 ret = ulpi_write(uphy->ulpi, ULPI_SET(ULPI_PWR_CLK_MNG_REG),
83 ULPI_PWR_OTG_COMP_DISABLE);
86 ret = ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXTSEL);
93 qcom_usb_hs_phy_vbus_notifier(struct notifier_block *nb, unsigned long event,
96 struct qcom_usb_hs_phy *uphy;
99 uphy = container_of(nb, struct qcom_usb_hs_phy, vbus_notify);
102 addr = ULPI_SET(ULPI_MISC_A);
104 addr = ULPI_CLR(ULPI_MISC_A);
106 return ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXT);
109 static int qcom_usb_hs_phy_power_on(struct phy *phy)
111 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
112 struct ulpi *ulpi = uphy->ulpi;
113 const struct ulpi_seq *seq;
116 ret = clk_prepare_enable(uphy->ref_clk);
120 ret = clk_prepare_enable(uphy->sleep_clk);
124 ret = regulator_set_load(uphy->v1p8, 50000);
128 ret = regulator_enable(uphy->v1p8);
132 ret = regulator_set_voltage_triplet(uphy->v3p3, 3050000, 3300000,
137 ret = regulator_set_load(uphy->v3p3, 50000);
141 ret = regulator_enable(uphy->v3p3);
145 for (seq = uphy->init_seq; seq->addr; seq++) {
146 ret = ulpi_write(ulpi, ULPI_EXT_VENDOR_SPECIFIC + seq->addr,
153 ret = reset_control_reset(uphy->reset);
158 if (uphy->vbus_edev) {
159 state = extcon_get_cable_state_(uphy->vbus_edev, EXTCON_USB);
160 /* setup initial state */
161 qcom_usb_hs_phy_vbus_notifier(&uphy->vbus_notify, state,
163 ret = extcon_register_notifier(uphy->vbus_edev, EXTCON_USB,
171 regulator_disable(uphy->v3p3);
173 regulator_disable(uphy->v1p8);
175 clk_disable_unprepare(uphy->sleep_clk);
177 clk_disable_unprepare(uphy->ref_clk);
181 static int qcom_usb_hs_phy_power_off(struct phy *phy)
184 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
186 if (uphy->vbus_edev) {
187 ret = extcon_unregister_notifier(uphy->vbus_edev, EXTCON_USB,
193 regulator_disable(uphy->v3p3);
194 regulator_disable(uphy->v1p8);
195 clk_disable_unprepare(uphy->sleep_clk);
196 clk_disable_unprepare(uphy->ref_clk);
201 static const struct phy_ops qcom_usb_hs_phy_ops = {
202 .power_on = qcom_usb_hs_phy_power_on,
203 .power_off = qcom_usb_hs_phy_power_off,
204 .set_mode = qcom_usb_hs_phy_set_mode,
205 .owner = THIS_MODULE,
208 static int qcom_usb_hs_phy_probe(struct ulpi *ulpi)
210 struct qcom_usb_hs_phy *uphy;
211 struct phy_provider *p;
213 struct regulator *reg;
214 struct reset_control *reset;
218 uphy = devm_kzalloc(&ulpi->dev, sizeof(*uphy), GFP_KERNEL);
221 ulpi_set_drvdata(ulpi, uphy);
224 size = of_property_count_u8_elems(ulpi->dev.of_node, "qcom,init-seq");
227 uphy->init_seq = devm_kmalloc_array(&ulpi->dev, (size / 2) + 1,
228 sizeof(*uphy->init_seq), GFP_KERNEL);
231 ret = of_property_read_u8_array(ulpi->dev.of_node, "qcom,init-seq",
232 (u8 *)uphy->init_seq, size);
236 uphy->init_seq[size / 2].addr = uphy->init_seq[size / 2].val = 0;
238 uphy->ref_clk = clk = devm_clk_get(&ulpi->dev, "ref");
242 uphy->sleep_clk = clk = devm_clk_get(&ulpi->dev, "sleep");
246 uphy->v1p8 = reg = devm_regulator_get(&ulpi->dev, "v1p8");
250 uphy->v3p3 = reg = devm_regulator_get(&ulpi->dev, "v3p3");
254 uphy->reset = reset = devm_reset_control_get(&ulpi->dev, "por");
256 if (PTR_ERR(reset) == -EPROBE_DEFER)
257 return PTR_ERR(reset);
261 uphy->phy = devm_phy_create(&ulpi->dev, ulpi->dev.of_node,
262 &qcom_usb_hs_phy_ops);
263 if (IS_ERR(uphy->phy))
264 return PTR_ERR(uphy->phy);
266 uphy->vbus_edev = extcon_get_edev_by_phandle(&ulpi->dev, 0);
267 if (IS_ERR(uphy->vbus_edev)) {
268 if (PTR_ERR(uphy->vbus_edev) != -ENODEV)
269 return PTR_ERR(uphy->vbus_edev);
270 uphy->vbus_edev = NULL;
273 uphy->vbus_notify.notifier_call = qcom_usb_hs_phy_vbus_notifier;
274 phy_set_drvdata(uphy->phy, uphy);
276 p = devm_of_phy_provider_register(&ulpi->dev, of_phy_simple_xlate);
277 return PTR_ERR_OR_ZERO(p);
280 static const struct of_device_id qcom_usb_hs_phy_match[] = {
281 { .compatible = "qcom,usb-hs-phy", },
284 MODULE_DEVICE_TABLE(of, qcom_usb_hs_phy_match);
286 static struct ulpi_driver qcom_usb_hs_phy_driver = {
287 .probe = qcom_usb_hs_phy_probe,
289 .name = "qcom_usb_hs_phy",
290 .of_match_table = qcom_usb_hs_phy_match,
293 module_ulpi_driver(qcom_usb_hs_phy_driver);
295 MODULE_DESCRIPTION("Qualcomm USB HS phy");
296 MODULE_LICENSE("GPL v2");