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_PHYCTRL1 0x80
19 #define MT6360_REG_PHYCTRL3 0x82
20 #define MT6360_REG_PHYCTRL7 0x86
21 #define MT6360_REG_VCONNCTRL1 0x8C
22 #define MT6360_REG_MODECTRL2 0x8F
23 #define MT6360_REG_SWRESET 0xA0
24 #define MT6360_REG_DEBCTRL1 0xA1
25 #define MT6360_REG_DRPCTRL1 0xA2
26 #define MT6360_REG_DRPCTRL2 0xA3
27 #define MT6360_REG_I2CTORST 0xBF
28 #define MT6360_REG_PHYCTRL11 0xCA
29 #define MT6360_REG_RXCTRL1 0xCE
30 #define MT6360_REG_RXCTRL2 0xCF
31 #define MT6360_REG_CTDCTRL2 0xEC
33 /* MT6360_REG_VCONNCTRL1 */
34 #define MT6360_VCONNCL_ENABLE BIT(0)
35 /* MT6360_REG_RXCTRL2 */
36 #define MT6360_OPEN40M_ENABLE BIT(7)
37 /* MT6360_REG_CTDCTRL2 */
38 #define MT6360_RPONESHOT_ENABLE BIT(6)
40 struct mt6360_tcpc_info {
41 struct tcpci_data tdata;
47 static inline int mt6360_tcpc_read16(struct regmap *regmap,
48 unsigned int reg, u16 *val)
50 return regmap_raw_read(regmap, reg, val, sizeof(u16));
53 static inline int mt6360_tcpc_write16(struct regmap *regmap,
54 unsigned int reg, u16 val)
56 return regmap_raw_write(regmap, reg, &val, sizeof(u16));
59 static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata)
61 struct regmap *regmap = tdata->regmap;
64 ret = regmap_write(regmap, MT6360_REG_SWRESET, 0x01);
68 /* after reset command, wait 1~2ms to wait IC action */
69 usleep_range(1000, 2000);
71 /* write all alert to masked */
72 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0);
76 /* config I2C timeout reset enable , and timeout to 200ms */
77 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F);
81 /* config CC Detect Debounce : 26.7*val us */
82 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10);
86 /* DRP Toggle Cycle : 51.2 + 6.4*val ms */
87 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4);
91 /* DRP Duyt Ctrl : dcSRC: /1024 */
92 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330);
96 /* Enable VCONN Current Limit function */
97 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE,
98 MT6360_VCONNCL_ENABLE);
102 /* Enable cc open 40ms when pmic send vsysuv signal */
103 ret = regmap_update_bits(regmap, MT6360_REG_RXCTRL2, MT6360_OPEN40M_ENABLE,
104 MT6360_OPEN40M_ENABLE);
108 /* Enable Rpdet oneshot detection */
109 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE,
110 MT6360_RPONESHOT_ENABLE);
115 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL1, 0x3A70);
119 ret = regmap_write(regmap, MT6360_REG_PHYCTRL3, 0x82);
123 ret = regmap_write(regmap, MT6360_REG_PHYCTRL7, 0x36);
127 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL11, 0x3C60);
131 ret = regmap_write(regmap, MT6360_REG_RXCTRL1, 0xE8);
135 /* Set shipping mode off, AUTOIDLE on */
136 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A);
139 static irqreturn_t mt6360_irq(int irq, void *dev_id)
141 struct mt6360_tcpc_info *mti = dev_id;
143 return tcpci_irq(mti->tcpci);
146 static int mt6360_tcpc_probe(struct platform_device *pdev)
148 struct mt6360_tcpc_info *mti;
151 mti = devm_kzalloc(&pdev->dev, sizeof(*mti), GFP_KERNEL);
155 mti->dev = &pdev->dev;
157 mti->tdata.regmap = dev_get_regmap(pdev->dev.parent, NULL);
158 if (!mti->tdata.regmap) {
159 dev_err(&pdev->dev, "Failed to get parent regmap\n");
163 mti->irq = platform_get_irq_byname(pdev, "PD_IRQB");
167 mti->tdata.init = mt6360_tcpc_init;
168 mti->tcpci = tcpci_register_port(&pdev->dev, &mti->tdata);
169 if (IS_ERR(mti->tcpci)) {
170 dev_err(&pdev->dev, "Failed to register tcpci port\n");
171 return PTR_ERR(mti->tcpci);
174 ret = devm_request_threaded_irq(mti->dev, mti->irq, NULL, mt6360_irq, IRQF_ONESHOT,
175 dev_name(&pdev->dev), mti);
177 dev_err(mti->dev, "Failed to register irq\n");
178 tcpci_unregister_port(mti->tcpci);
182 device_init_wakeup(&pdev->dev, true);
183 platform_set_drvdata(pdev, mti);
188 static int mt6360_tcpc_remove(struct platform_device *pdev)
190 struct mt6360_tcpc_info *mti = platform_get_drvdata(pdev);
192 disable_irq(mti->irq);
193 tcpci_unregister_port(mti->tcpci);
197 static int __maybe_unused mt6360_tcpc_suspend(struct device *dev)
199 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
201 if (device_may_wakeup(dev))
202 enable_irq_wake(mti->irq);
207 static int __maybe_unused mt6360_tcpc_resume(struct device *dev)
209 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
211 if (device_may_wakeup(dev))
212 disable_irq_wake(mti->irq);
217 static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume);
219 static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = {
220 { .compatible = "mediatek,mt6360-tcpc", },
223 MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id);
225 static struct platform_driver mt6360_tcpc_driver = {
227 .name = "mt6360-tcpc",
228 .pm = &mt6360_tcpc_pm_ops,
229 .of_match_table = mt6360_tcpc_of_id,
231 .probe = mt6360_tcpc_probe,
232 .remove = mt6360_tcpc_remove,
234 module_platform_driver(mt6360_tcpc_driver);
236 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
237 MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver");
238 MODULE_LICENSE("GPL v2");