1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2022 Richtek Technology Corp.
5 * Author: ChiYuan Huang <cy_huang@richtek.com>
8 #include <linux/bits.h>
9 #include <linux/interrupt.h>
10 #include <linux/kernel.h>
11 #include <linux/mod_devicetable.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/pm_wakeup.h>
15 #include <linux/pm_wakeirq.h>
16 #include <linux/regmap.h>
17 #include <linux/regulator/consumer.h>
18 #include <linux/usb/tcpci.h>
19 #include <linux/usb/tcpm.h>
21 #define MT6370_REG_SYSCTRL8 0x9B
23 #define MT6370_AUTOIDLE_MASK BIT(3)
25 #define MT6370_VENDOR_ID 0x29CF
26 #define MT6370_TCPC_DID_A 0x2170
30 struct regulator *vbus;
32 struct tcpci_data tcpci_data;
35 static const struct reg_sequence mt6370_reg_init[] = {
36 REG_SEQ(0xA0, 0x1, 1000),
37 REG_SEQ(0x81, 0x38, 0),
38 REG_SEQ(0x82, 0x82, 0),
39 REG_SEQ(0xBA, 0xFC, 0),
40 REG_SEQ(0xBB, 0x50, 0),
41 REG_SEQ(0x9E, 0x8F, 0),
42 REG_SEQ(0xA1, 0x5, 0),
43 REG_SEQ(0xA2, 0x4, 0),
44 REG_SEQ(0xA3, 0x4A, 0),
45 REG_SEQ(0xA4, 0x01, 0),
46 REG_SEQ(0x95, 0x01, 0),
47 REG_SEQ(0x80, 0x71, 0),
48 REG_SEQ(0x9B, 0x3A, 1000),
51 static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data)
56 ret = regmap_register_patch(data->regmap, mt6370_reg_init,
57 ARRAY_SIZE(mt6370_reg_init));
61 ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16));
65 if (did == MT6370_TCPC_DID_A)
66 return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80);
71 static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data,
74 return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8,
76 enable ? 0 : MT6370_AUTOIDLE_MASK);
79 static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data,
80 bool source, bool sink)
82 struct mt6370_priv *priv = container_of(data, struct mt6370_priv,
86 ret = regulator_is_enabled(priv->vbus);
91 return regulator_disable(priv->vbus);
94 return regulator_enable(priv->vbus);
99 static irqreturn_t mt6370_irq_handler(int irq, void *dev_id)
101 struct mt6370_priv *priv = dev_id;
103 return tcpci_irq(priv->tcpci);
106 static int mt6370_check_vendor_info(struct mt6370_priv *priv)
108 struct regmap *regmap = priv->tcpci_data.regmap;
112 ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16));
116 if (vid != MT6370_VENDOR_ID)
117 return dev_err_probe(priv->dev, -ENODEV,
118 "Vendor ID not correct 0x%02x\n", vid);
123 static void mt6370_unregister_tcpci_port(void *tcpci)
125 tcpci_unregister_port(tcpci);
128 static int mt6370_tcpc_probe(struct platform_device *pdev)
130 struct mt6370_priv *priv;
131 struct device *dev = &pdev->dev;
134 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
140 priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL);
141 if (!priv->tcpci_data.regmap)
142 return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n");
144 ret = mt6370_check_vendor_info(priv);
148 irq = platform_get_irq(pdev, 0);
150 return dev_err_probe(dev, irq, "Failed to get irq\n");
152 /* Assign TCPCI feature and ops */
153 priv->tcpci_data.auto_discharge_disconnect = 1;
154 priv->tcpci_data.init = mt6370_tcpc_init;
155 priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn;
157 priv->vbus = devm_regulator_get_optional(dev, "vbus");
158 if (!IS_ERR(priv->vbus))
159 priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus;
161 priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data);
162 if (IS_ERR(priv->tcpci))
163 return dev_err_probe(dev, PTR_ERR(priv->tcpci),
164 "Failed to register tcpci port\n");
166 ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci);
170 ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler,
171 IRQF_ONESHOT, dev_name(dev), priv);
173 return dev_err_probe(dev, ret, "Failed to allocate irq\n");
175 device_init_wakeup(dev, true);
176 dev_pm_set_wake_irq(dev, irq);
181 static int mt6370_tcpc_remove(struct platform_device *pdev)
183 dev_pm_clear_wake_irq(&pdev->dev);
184 device_init_wakeup(&pdev->dev, false);
189 static const struct of_device_id mt6370_tcpc_devid_table[] = {
190 { .compatible = "mediatek,mt6370-tcpc" },
193 MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table);
195 static struct platform_driver mt6370_tcpc_driver = {
197 .name = "mt6370-tcpc",
198 .of_match_table = mt6370_tcpc_devid_table,
200 .probe = mt6370_tcpc_probe,
201 .remove = mt6370_tcpc_remove,
203 module_platform_driver(mt6370_tcpc_driver);
205 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
206 MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver");
207 MODULE_LICENSE("GPL v2");