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6#include <linux/err.h>
7#include <linux/interrupt.h>
8#include <linux/kernel.h>
9#include <linux/mod_devicetable.h>
10#include <linux/module.h>
11#include <linux/platform_device.h>
12#include <linux/regmap.h>
13#include <linux/regulator/consumer.h>
14#include <linux/slab.h>
15#include <linux/usb/role.h>
16#include <linux/usb/typec_mux.h>
17
18#define TYPEC_MISC_STATUS 0xb
19#define CC_ATTACHED BIT(0)
20#define CC_ORIENTATION BIT(1)
21#define SNK_SRC_MODE BIT(6)
22#define TYPEC_MODE_CFG 0x44
23#define TYPEC_DISABLE_CMD BIT(0)
24#define EN_SNK_ONLY BIT(1)
25#define EN_SRC_ONLY BIT(2)
26#define TYPEC_VCONN_CONTROL 0x46
27#define VCONN_EN_SRC BIT(0)
28#define VCONN_EN_VAL BIT(1)
29#define TYPEC_EXIT_STATE_CFG 0x50
30#define SEL_SRC_UPPER_REF BIT(2)
31#define TYPEC_INTR_EN_CFG_1 0x5e
32#define TYPEC_INTR_EN_CFG_1_MASK GENMASK(7, 0)
33
34struct qcom_pmic_typec {
35 struct device *dev;
36 struct regmap *regmap;
37 u32 base;
38
39 struct typec_port *port;
40 struct usb_role_switch *role_sw;
41
42 struct regulator *vbus_reg;
43 bool vbus_enabled;
44};
45
46static void qcom_pmic_typec_enable_vbus_regulator(struct qcom_pmic_typec
47 *qcom_usb, bool enable)
48{
49 int ret;
50
51 if (enable == qcom_usb->vbus_enabled)
52 return;
53
54 if (enable) {
55 ret = regulator_enable(qcom_usb->vbus_reg);
56 if (ret)
57 return;
58 } else {
59 ret = regulator_disable(qcom_usb->vbus_reg);
60 if (ret)
61 return;
62 }
63 qcom_usb->vbus_enabled = enable;
64}
65
66static void qcom_pmic_typec_check_connection(struct qcom_pmic_typec *qcom_usb)
67{
68 enum typec_orientation orientation;
69 enum usb_role role;
70 unsigned int stat;
71 bool enable_vbus;
72
73 regmap_read(qcom_usb->regmap, qcom_usb->base + TYPEC_MISC_STATUS,
74 &stat);
75
76 if (stat & CC_ATTACHED) {
77 orientation = (stat & CC_ORIENTATION) ?
78 TYPEC_ORIENTATION_REVERSE :
79 TYPEC_ORIENTATION_NORMAL;
80 typec_set_orientation(qcom_usb->port, orientation);
81
82 role = (stat & SNK_SRC_MODE) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
83 if (role == USB_ROLE_HOST)
84 enable_vbus = true;
85 else
86 enable_vbus = false;
87 } else {
88 role = USB_ROLE_NONE;
89 enable_vbus = false;
90 }
91
92 qcom_pmic_typec_enable_vbus_regulator(qcom_usb, enable_vbus);
93 usb_role_switch_set_role(qcom_usb->role_sw, role);
94}
95
96static irqreturn_t qcom_pmic_typec_interrupt(int irq, void *_qcom_usb)
97{
98 struct qcom_pmic_typec *qcom_usb = _qcom_usb;
99
100 qcom_pmic_typec_check_connection(qcom_usb);
101 return IRQ_HANDLED;
102}
103
104static void qcom_pmic_typec_typec_hw_init(struct qcom_pmic_typec *qcom_usb,
105 enum typec_port_type type)
106{
107 u8 mode = 0;
108
109 regmap_update_bits(qcom_usb->regmap,
110 qcom_usb->base + TYPEC_INTR_EN_CFG_1,
111 TYPEC_INTR_EN_CFG_1_MASK, 0);
112
113 if (type == TYPEC_PORT_SRC)
114 mode = EN_SRC_ONLY;
115 else if (type == TYPEC_PORT_SNK)
116 mode = EN_SNK_ONLY;
117
118 regmap_update_bits(qcom_usb->regmap, qcom_usb->base + TYPEC_MODE_CFG,
119 EN_SNK_ONLY | EN_SRC_ONLY, mode);
120
121 regmap_update_bits(qcom_usb->regmap,
122 qcom_usb->base + TYPEC_VCONN_CONTROL,
123 VCONN_EN_SRC | VCONN_EN_VAL, VCONN_EN_SRC);
124 regmap_update_bits(qcom_usb->regmap,
125 qcom_usb->base + TYPEC_EXIT_STATE_CFG,
126 SEL_SRC_UPPER_REF, SEL_SRC_UPPER_REF);
127}
128
129static int qcom_pmic_typec_probe(struct platform_device *pdev)
130{
131 struct qcom_pmic_typec *qcom_usb;
132 struct device *dev = &pdev->dev;
133 struct fwnode_handle *fwnode;
134 struct typec_capability cap;
135 const char *buf;
136 int ret, irq, role;
137 u32 reg;
138
139 ret = device_property_read_u32(dev, "reg", ®);
140 if (ret < 0) {
141 dev_err(dev, "missing base address\n");
142 return ret;
143 }
144
145 qcom_usb = devm_kzalloc(dev, sizeof(*qcom_usb), GFP_KERNEL);
146 if (!qcom_usb)
147 return -ENOMEM;
148
149 qcom_usb->dev = dev;
150 qcom_usb->base = reg;
151
152 qcom_usb->regmap = dev_get_regmap(dev->parent, NULL);
153 if (!qcom_usb->regmap) {
154 dev_err(dev, "Failed to get regmap\n");
155 return -EINVAL;
156 }
157
158 qcom_usb->vbus_reg = devm_regulator_get(qcom_usb->dev, "usb_vbus");
159 if (IS_ERR(qcom_usb->vbus_reg))
160 return PTR_ERR(qcom_usb->vbus_reg);
161
162 fwnode = device_get_named_child_node(dev, "connector");
163 if (!fwnode)
164 return -EINVAL;
165
166 ret = fwnode_property_read_string(fwnode, "power-role", &buf);
167 if (!ret) {
168 role = typec_find_port_power_role(buf);
169 if (role < 0)
170 role = TYPEC_PORT_SNK;
171 } else {
172 role = TYPEC_PORT_SNK;
173 }
174 cap.type = role;
175
176 ret = fwnode_property_read_string(fwnode, "data-role", &buf);
177 if (!ret) {
178 role = typec_find_port_data_role(buf);
179 if (role < 0)
180 role = TYPEC_PORT_UFP;
181 } else {
182 role = TYPEC_PORT_UFP;
183 }
184 cap.data = role;
185
186 cap.prefer_role = TYPEC_NO_PREFERRED_ROLE;
187 cap.fwnode = fwnode;
188 qcom_usb->port = typec_register_port(dev, &cap);
189 if (IS_ERR(qcom_usb->port)) {
190 ret = PTR_ERR(qcom_usb->port);
191 dev_err(dev, "Failed to register type c port %d\n", ret);
192 goto err_put_node;
193 }
194 fwnode_handle_put(fwnode);
195
196 qcom_usb->role_sw = fwnode_usb_role_switch_get(dev_fwnode(qcom_usb->dev));
197 if (IS_ERR(qcom_usb->role_sw)) {
198 if (PTR_ERR(qcom_usb->role_sw) != -EPROBE_DEFER)
199 dev_err(dev, "failed to get role switch\n");
200 ret = PTR_ERR(qcom_usb->role_sw);
201 goto err_typec_port;
202 }
203
204 irq = platform_get_irq(pdev, 0);
205 if (irq < 0)
206 goto err_usb_role_sw;
207
208 ret = devm_request_threaded_irq(qcom_usb->dev, irq, NULL,
209 qcom_pmic_typec_interrupt, IRQF_ONESHOT,
210 "qcom-pmic-typec", qcom_usb);
211 if (ret) {
212 dev_err(&pdev->dev, "Could not request IRQ\n");
213 goto err_usb_role_sw;
214 }
215
216 platform_set_drvdata(pdev, qcom_usb);
217 qcom_pmic_typec_typec_hw_init(qcom_usb, cap.type);
218 qcom_pmic_typec_check_connection(qcom_usb);
219
220 return 0;
221
222err_usb_role_sw:
223 usb_role_switch_put(qcom_usb->role_sw);
224err_typec_port:
225 typec_unregister_port(qcom_usb->port);
226err_put_node:
227 fwnode_handle_put(fwnode);
228
229 return ret;
230}
231
232static int qcom_pmic_typec_remove(struct platform_device *pdev)
233{
234 struct qcom_pmic_typec *qcom_usb = platform_get_drvdata(pdev);
235
236 usb_role_switch_set_role(qcom_usb->role_sw, USB_ROLE_NONE);
237 qcom_pmic_typec_enable_vbus_regulator(qcom_usb, 0);
238
239 typec_unregister_port(qcom_usb->port);
240 usb_role_switch_put(qcom_usb->role_sw);
241
242 return 0;
243}
244
245static const struct of_device_id qcom_pmic_typec_table[] = {
246 { .compatible = "qcom,pm8150b-usb-typec" },
247 { }
248};
249MODULE_DEVICE_TABLE(of, qcom_pmic_typec_table);
250
251static struct platform_driver qcom_pmic_typec = {
252 .driver = {
253 .name = "qcom,pmic-typec",
254 .of_match_table = qcom_pmic_typec_table,
255 },
256 .probe = qcom_pmic_typec_probe,
257 .remove = qcom_pmic_typec_remove,
258};
259module_platform_driver(qcom_pmic_typec);
260
261MODULE_DESCRIPTION("QCOM PMIC USB type C driver");
262MODULE_LICENSE("GPL v2");
263
