1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2020 MediaTek Inc.
5 * Author: ChiYuan Huang <cy_huang@richtek.com>
8 #include <linux/interrupt.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/usb/tcpm.h>
18 #define MT6360_REG_VCONNCTRL1 0x8C
19 #define MT6360_REG_MODECTRL2 0x8F
20 #define MT6360_REG_SWRESET 0xA0
21 #define MT6360_REG_DEBCTRL1 0xA1
22 #define MT6360_REG_DRPCTRL1 0xA2
23 #define MT6360_REG_DRPCTRL2 0xA3
24 #define MT6360_REG_I2CTORST 0xBF
25 #define MT6360_REG_RXCTRL2 0xCF
26 #define MT6360_REG_CTDCTRL2 0xEC
28 /* MT6360_REG_VCONNCTRL1 */
29 #define MT6360_VCONNCL_ENABLE BIT(0)
30 /* MT6360_REG_RXCTRL2 */
31 #define MT6360_OPEN40M_ENABLE BIT(7)
32 /* MT6360_REG_CTDCTRL2 */
33 #define MT6360_RPONESHOT_ENABLE BIT(6)
35 struct mt6360_tcpc_info {
36 struct tcpci_data tdata;
42 static inline int mt6360_tcpc_read16(struct regmap *regmap,
43 unsigned int reg, u16 *val)
45 return regmap_raw_read(regmap, reg, val, sizeof(u16));
48 static inline int mt6360_tcpc_write16(struct regmap *regmap,
49 unsigned int reg, u16 val)
51 return regmap_raw_write(regmap, reg, &val, sizeof(u16));
54 static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata)
56 struct regmap *regmap = tdata->regmap;
59 ret = regmap_write(regmap, MT6360_REG_SWRESET, 0x01);
63 /* after reset command, wait 1~2ms to wait IC action */
64 usleep_range(1000, 2000);
66 /* write all alert to masked */
67 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0);
71 /* config I2C timeout reset enable , and timeout to 200ms */
72 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F);
76 /* config CC Detect Debounce : 26.7*val us */
77 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10);
81 /* DRP Toggle Cycle : 51.2 + 6.4*val ms */
82 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4);
86 /* DRP Duyt Ctrl : dcSRC: /1024 */
87 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330);
91 /* Enable VCONN Current Limit function */
92 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE,
93 MT6360_VCONNCL_ENABLE);
97 /* Enable cc open 40ms when pmic send vsysuv signal */
98 ret = regmap_update_bits(regmap, MT6360_REG_RXCTRL2, MT6360_OPEN40M_ENABLE,
99 MT6360_OPEN40M_ENABLE);
103 /* Enable Rpdet oneshot detection */
104 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE,
105 MT6360_RPONESHOT_ENABLE);
109 /* Set shipping mode off, AUTOIDLE on */
110 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A);
113 static irqreturn_t mt6360_irq(int irq, void *dev_id)
115 struct mt6360_tcpc_info *mti = dev_id;
117 return tcpci_irq(mti->tcpci);
120 static int mt6360_tcpc_probe(struct platform_device *pdev)
122 struct mt6360_tcpc_info *mti;
125 mti = devm_kzalloc(&pdev->dev, sizeof(*mti), GFP_KERNEL);
129 mti->dev = &pdev->dev;
131 mti->tdata.regmap = dev_get_regmap(pdev->dev.parent, NULL);
132 if (!mti->tdata.regmap) {
133 dev_err(&pdev->dev, "Failed to get parent regmap\n");
137 mti->irq = platform_get_irq_byname(pdev, "PD_IRQB");
141 mti->tdata.init = mt6360_tcpc_init;
142 mti->tcpci = tcpci_register_port(&pdev->dev, &mti->tdata);
143 if (IS_ERR(mti->tcpci)) {
144 dev_err(&pdev->dev, "Failed to register tcpci port\n");
145 return PTR_ERR(mti->tcpci);
148 ret = devm_request_threaded_irq(mti->dev, mti->irq, NULL, mt6360_irq, IRQF_ONESHOT,
149 dev_name(&pdev->dev), mti);
151 dev_err(mti->dev, "Failed to register irq\n");
152 tcpci_unregister_port(mti->tcpci);
156 device_init_wakeup(&pdev->dev, true);
157 platform_set_drvdata(pdev, mti);
162 static int mt6360_tcpc_remove(struct platform_device *pdev)
164 struct mt6360_tcpc_info *mti = platform_get_drvdata(pdev);
166 disable_irq(mti->irq);
167 tcpci_unregister_port(mti->tcpci);
171 static int __maybe_unused mt6360_tcpc_suspend(struct device *dev)
173 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
175 if (device_may_wakeup(dev))
176 enable_irq_wake(mti->irq);
181 static int __maybe_unused mt6360_tcpc_resume(struct device *dev)
183 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
185 if (device_may_wakeup(dev))
186 disable_irq_wake(mti->irq);
191 static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume);
193 static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = {
194 { .compatible = "mediatek,mt6360-tcpc", },
197 MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id);
199 static struct platform_driver mt6360_tcpc_driver = {
201 .name = "mt6360-tcpc",
202 .pm = &mt6360_tcpc_pm_ops,
203 .of_match_table = mt6360_tcpc_of_id,
205 .probe = mt6360_tcpc_probe,
206 .remove = mt6360_tcpc_remove,
208 module_platform_driver(mt6360_tcpc_driver);
210 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
211 MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver");
212 MODULE_LICENSE("GPL v2");