This source file includes following definitions.
- qcom_usb_hs_phy_set_mode
- qcom_usb_hs_phy_vbus_notifier
- qcom_usb_hs_phy_power_on
- qcom_usb_hs_phy_power_off
- qcom_usb_hs_phy_probe
1
2
3
4
5 #include <linux/module.h>
6 #include <linux/ulpi/driver.h>
7 #include <linux/ulpi/regs.h>
8 #include <linux/clk.h>
9 #include <linux/regulator/consumer.h>
10 #include <linux/of_device.h>
11 #include <linux/phy/phy.h>
12 #include <linux/reset.h>
13 #include <linux/extcon.h>
14 #include <linux/notifier.h>
15
16 #define ULPI_PWR_CLK_MNG_REG 0x88
17 # define ULPI_PWR_OTG_COMP_DISABLE BIT(0)
18
19 #define ULPI_MISC_A 0x96
20 # define ULPI_MISC_A_VBUSVLDEXTSEL BIT(1)
21 # define ULPI_MISC_A_VBUSVLDEXT BIT(0)
22
23
24 struct ulpi_seq {
25 u8 addr;
26 u8 val;
27 };
28
29 struct qcom_usb_hs_phy {
30 struct ulpi *ulpi;
31 struct phy *phy;
32 struct clk *ref_clk;
33 struct clk *sleep_clk;
34 struct regulator *v1p8;
35 struct regulator *v3p3;
36 struct reset_control *reset;
37 struct ulpi_seq *init_seq;
38 struct extcon_dev *vbus_edev;
39 struct notifier_block vbus_notify;
40 };
41
42 static int qcom_usb_hs_phy_set_mode(struct phy *phy,
43 enum phy_mode mode, int submode)
44 {
45 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
46 u8 addr;
47 int ret;
48
49 if (!uphy->vbus_edev) {
50 u8 val = 0;
51
52 switch (mode) {
53 case PHY_MODE_USB_OTG:
54 case PHY_MODE_USB_HOST:
55 val |= ULPI_INT_IDGRD;
56
57 case PHY_MODE_USB_DEVICE:
58 val |= ULPI_INT_SESS_VALID;
59 default:
60 break;
61 }
62
63 ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_RISE, val);
64 if (ret)
65 return ret;
66 ret = ulpi_write(uphy->ulpi, ULPI_USB_INT_EN_FALL, val);
67 } else {
68 switch (mode) {
69 case PHY_MODE_USB_OTG:
70 case PHY_MODE_USB_DEVICE:
71 addr = ULPI_SET(ULPI_MISC_A);
72 break;
73 case PHY_MODE_USB_HOST:
74 addr = ULPI_CLR(ULPI_MISC_A);
75 break;
76 default:
77 return -EINVAL;
78 }
79
80 ret = ulpi_write(uphy->ulpi, ULPI_SET(ULPI_PWR_CLK_MNG_REG),
81 ULPI_PWR_OTG_COMP_DISABLE);
82 if (ret)
83 return ret;
84 ret = ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXTSEL);
85 }
86
87 return ret;
88 }
89
90 static int
91 qcom_usb_hs_phy_vbus_notifier(struct notifier_block *nb, unsigned long event,
92 void *ptr)
93 {
94 struct qcom_usb_hs_phy *uphy;
95 u8 addr;
96
97 uphy = container_of(nb, struct qcom_usb_hs_phy, vbus_notify);
98
99 if (event)
100 addr = ULPI_SET(ULPI_MISC_A);
101 else
102 addr = ULPI_CLR(ULPI_MISC_A);
103
104 return ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXT);
105 }
106
107 static int qcom_usb_hs_phy_power_on(struct phy *phy)
108 {
109 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
110 struct ulpi *ulpi = uphy->ulpi;
111 const struct ulpi_seq *seq;
112 int ret, state;
113
114 ret = clk_prepare_enable(uphy->ref_clk);
115 if (ret)
116 return ret;
117
118 ret = clk_prepare_enable(uphy->sleep_clk);
119 if (ret)
120 goto err_sleep;
121
122 ret = regulator_set_load(uphy->v1p8, 50000);
123 if (ret < 0)
124 goto err_1p8;
125
126 ret = regulator_enable(uphy->v1p8);
127 if (ret)
128 goto err_1p8;
129
130 ret = regulator_set_voltage_triplet(uphy->v3p3, 3050000, 3300000,
131 3300000);
132 if (ret)
133 goto err_3p3;
134
135 ret = regulator_set_load(uphy->v3p3, 50000);
136 if (ret < 0)
137 goto err_3p3;
138
139 ret = regulator_enable(uphy->v3p3);
140 if (ret)
141 goto err_3p3;
142
143 for (seq = uphy->init_seq; seq->addr; seq++) {
144 ret = ulpi_write(ulpi, ULPI_EXT_VENDOR_SPECIFIC + seq->addr,
145 seq->val);
146 if (ret)
147 goto err_ulpi;
148 }
149
150 if (uphy->reset) {
151 ret = reset_control_reset(uphy->reset);
152 if (ret)
153 goto err_ulpi;
154 }
155
156 if (uphy->vbus_edev) {
157 state = extcon_get_state(uphy->vbus_edev, EXTCON_USB);
158
159 qcom_usb_hs_phy_vbus_notifier(&uphy->vbus_notify, state,
160 uphy->vbus_edev);
161 ret = extcon_register_notifier(uphy->vbus_edev, EXTCON_USB,
162 &uphy->vbus_notify);
163 if (ret)
164 goto err_ulpi;
165 }
166
167 return 0;
168 err_ulpi:
169 regulator_disable(uphy->v3p3);
170 err_3p3:
171 regulator_disable(uphy->v1p8);
172 err_1p8:
173 clk_disable_unprepare(uphy->sleep_clk);
174 err_sleep:
175 clk_disable_unprepare(uphy->ref_clk);
176 return ret;
177 }
178
179 static int qcom_usb_hs_phy_power_off(struct phy *phy)
180 {
181 struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy);
182
183 if (uphy->vbus_edev)
184 extcon_unregister_notifier(uphy->vbus_edev, EXTCON_USB,
185 &uphy->vbus_notify);
186 regulator_disable(uphy->v3p3);
187 regulator_disable(uphy->v1p8);
188 clk_disable_unprepare(uphy->sleep_clk);
189 clk_disable_unprepare(uphy->ref_clk);
190
191 return 0;
192 }
193
194 static const struct phy_ops qcom_usb_hs_phy_ops = {
195 .power_on = qcom_usb_hs_phy_power_on,
196 .power_off = qcom_usb_hs_phy_power_off,
197 .set_mode = qcom_usb_hs_phy_set_mode,
198 .owner = THIS_MODULE,
199 };
200
201 static int qcom_usb_hs_phy_probe(struct ulpi *ulpi)
202 {
203 struct qcom_usb_hs_phy *uphy;
204 struct phy_provider *p;
205 struct clk *clk;
206 struct regulator *reg;
207 struct reset_control *reset;
208 int size;
209 int ret;
210
211 uphy = devm_kzalloc(&ulpi->dev, sizeof(*uphy), GFP_KERNEL);
212 if (!uphy)
213 return -ENOMEM;
214 ulpi_set_drvdata(ulpi, uphy);
215 uphy->ulpi = ulpi;
216
217 size = of_property_count_u8_elems(ulpi->dev.of_node, "qcom,init-seq");
218 if (size < 0)
219 size = 0;
220 uphy->init_seq = devm_kmalloc_array(&ulpi->dev, (size / 2) + 1,
221 sizeof(*uphy->init_seq), GFP_KERNEL);
222 if (!uphy->init_seq)
223 return -ENOMEM;
224 ret = of_property_read_u8_array(ulpi->dev.of_node, "qcom,init-seq",
225 (u8 *)uphy->init_seq, size);
226 if (ret && size)
227 return ret;
228
229 uphy->init_seq[size / 2].addr = uphy->init_seq[size / 2].val = 0;
230
231 uphy->ref_clk = clk = devm_clk_get(&ulpi->dev, "ref");
232 if (IS_ERR(clk))
233 return PTR_ERR(clk);
234
235 uphy->sleep_clk = clk = devm_clk_get(&ulpi->dev, "sleep");
236 if (IS_ERR(clk))
237 return PTR_ERR(clk);
238
239 uphy->v1p8 = reg = devm_regulator_get(&ulpi->dev, "v1p8");
240 if (IS_ERR(reg))
241 return PTR_ERR(reg);
242
243 uphy->v3p3 = reg = devm_regulator_get(&ulpi->dev, "v3p3");
244 if (IS_ERR(reg))
245 return PTR_ERR(reg);
246
247 uphy->reset = reset = devm_reset_control_get(&ulpi->dev, "por");
248 if (IS_ERR(reset)) {
249 if (PTR_ERR(reset) == -EPROBE_DEFER)
250 return PTR_ERR(reset);
251 uphy->reset = NULL;
252 }
253
254 uphy->phy = devm_phy_create(&ulpi->dev, ulpi->dev.of_node,
255 &qcom_usb_hs_phy_ops);
256 if (IS_ERR(uphy->phy))
257 return PTR_ERR(uphy->phy);
258
259 uphy->vbus_edev = extcon_get_edev_by_phandle(&ulpi->dev, 0);
260 if (IS_ERR(uphy->vbus_edev)) {
261 if (PTR_ERR(uphy->vbus_edev) != -ENODEV)
262 return PTR_ERR(uphy->vbus_edev);
263 uphy->vbus_edev = NULL;
264 }
265
266 uphy->vbus_notify.notifier_call = qcom_usb_hs_phy_vbus_notifier;
267 phy_set_drvdata(uphy->phy, uphy);
268
269 p = devm_of_phy_provider_register(&ulpi->dev, of_phy_simple_xlate);
270 return PTR_ERR_OR_ZERO(p);
271 }
272
273 static const struct of_device_id qcom_usb_hs_phy_match[] = {
274 { .compatible = "qcom,usb-hs-phy", },
275 { }
276 };
277 MODULE_DEVICE_TABLE(of, qcom_usb_hs_phy_match);
278
279 static struct ulpi_driver qcom_usb_hs_phy_driver = {
280 .probe = qcom_usb_hs_phy_probe,
281 .driver = {
282 .name = "qcom_usb_hs_phy",
283 .of_match_table = qcom_usb_hs_phy_match,
284 },
285 };
286 module_ulpi_driver(qcom_usb_hs_phy_driver);
287
288 MODULE_DESCRIPTION("Qualcomm USB HS phy");
289 MODULE_LICENSE("GPL v2");