1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2020 MediaTek Inc.
4 *
5 * Author: ChiYuan Huang <cy_huang@richtek.com>
6 */
7
8 #include <linux/interrupt.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/platform_device.h>
13 #include <linux/regmap.h>
14 #include <linux/usb/tcpci.h>
15 #include <linux/usb/tcpm.h>
16
17 #define MT6360_REG_PHYCTRL1 0x80
18 #define MT6360_REG_PHYCTRL3 0x82
19 #define MT6360_REG_PHYCTRL7 0x86
20 #define MT6360_REG_VCONNCTRL1 0x8C
21 #define MT6360_REG_MODECTRL2 0x8F
22 #define MT6360_REG_SWRESET 0xA0
23 #define MT6360_REG_DEBCTRL1 0xA1
24 #define MT6360_REG_DRPCTRL1 0xA2
25 #define MT6360_REG_DRPCTRL2 0xA3
26 #define MT6360_REG_I2CTORST 0xBF
27 #define MT6360_REG_PHYCTRL11 0xCA
28 #define MT6360_REG_RXCTRL1 0xCE
29 #define MT6360_REG_RXCTRL2 0xCF
30 #define MT6360_REG_CTDCTRL2 0xEC
31
32 /* MT6360_REG_VCONNCTRL1 */
33 #define MT6360_VCONNCL_ENABLE BIT(0)
34 /* MT6360_REG_RXCTRL2 */
35 #define MT6360_OPEN40M_ENABLE BIT(7)
36 /* MT6360_REG_CTDCTRL2 */
37 #define MT6360_RPONESHOT_ENABLE BIT(6)
38
39 struct mt6360_tcpc_info {
40 struct tcpci_data tdata;
41 struct tcpci *tcpci;
42 struct device *dev;
43 int irq;
44 };
45
mt6360_tcpc_write16(struct regmap * regmap,unsigned int reg,u16 val)46 static inline int mt6360_tcpc_write16(struct regmap *regmap,
47 unsigned int reg, u16 val)
48 {
49 return regmap_raw_write(regmap, reg, &val, sizeof(u16));
50 }
51
mt6360_tcpc_init(struct tcpci * tcpci,struct tcpci_data * tdata)52 static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata)
53 {
54 struct regmap *regmap = tdata->regmap;
55 int ret;
56
57 ret = regmap_write(regmap, MT6360_REG_SWRESET, 0x01);
58 if (ret)
59 return ret;
60
61 /* after reset command, wait 1~2ms to wait IC action */
62 usleep_range(1000, 2000);
63
64 /* write all alert to masked */
65 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0);
66 if (ret)
67 return ret;
68
69 /* config I2C timeout reset enable , and timeout to 200ms */
70 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F);
71 if (ret)
72 return ret;
73
74 /* config CC Detect Debounce : 26.7*val us */
75 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10);
76 if (ret)
77 return ret;
78
79 /* DRP Toggle Cycle : 51.2 + 6.4*val ms */
80 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4);
81 if (ret)
82 return ret;
83
84 /* DRP Duyt Ctrl : dcSRC: /1024 */
85 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330);
86 if (ret)
87 return ret;
88
89 /* Enable VCONN Current Limit function */
90 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE,
91 MT6360_VCONNCL_ENABLE);
92 if (ret)
93 return ret;
94
95 /* Enable cc open 40ms when pmic send vsysuv signal */
96 ret = regmap_update_bits(regmap, MT6360_REG_RXCTRL2, MT6360_OPEN40M_ENABLE,
97 MT6360_OPEN40M_ENABLE);
98 if (ret)
99 return ret;
100
101 /* Enable Rpdet oneshot detection */
102 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE,
103 MT6360_RPONESHOT_ENABLE);
104 if (ret)
105 return ret;
106
107 /* BMC PHY */
108 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL1, 0x3A70);
109 if (ret)
110 return ret;
111
112 ret = regmap_write(regmap, MT6360_REG_PHYCTRL3, 0x82);
113 if (ret)
114 return ret;
115
116 ret = regmap_write(regmap, MT6360_REG_PHYCTRL7, 0x36);
117 if (ret)
118 return ret;
119
120 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL11, 0x3C60);
121 if (ret)
122 return ret;
123
124 ret = regmap_write(regmap, MT6360_REG_RXCTRL1, 0xE8);
125 if (ret)
126 return ret;
127
128 /* Set shipping mode off, AUTOIDLE on */
129 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A);
130 }
131
mt6360_irq(int irq,void * dev_id)132 static irqreturn_t mt6360_irq(int irq, void *dev_id)
133 {
134 struct mt6360_tcpc_info *mti = dev_id;
135
136 return tcpci_irq(mti->tcpci);
137 }
138
mt6360_tcpc_probe(struct platform_device * pdev)139 static int mt6360_tcpc_probe(struct platform_device *pdev)
140 {
141 struct mt6360_tcpc_info *mti;
142 int ret;
143
144 mti = devm_kzalloc(&pdev->dev, sizeof(*mti), GFP_KERNEL);
145 if (!mti)
146 return -ENOMEM;
147
148 mti->dev = &pdev->dev;
149
150 mti->tdata.regmap = dev_get_regmap(pdev->dev.parent, NULL);
151 if (!mti->tdata.regmap) {
152 dev_err(&pdev->dev, "Failed to get parent regmap\n");
153 return -ENODEV;
154 }
155
156 mti->irq = platform_get_irq_byname(pdev, "PD_IRQB");
157 if (mti->irq < 0)
158 return mti->irq;
159
160 mti->tdata.init = mt6360_tcpc_init;
161 mti->tcpci = tcpci_register_port(&pdev->dev, &mti->tdata);
162 if (IS_ERR(mti->tcpci)) {
163 dev_err(&pdev->dev, "Failed to register tcpci port\n");
164 return PTR_ERR(mti->tcpci);
165 }
166
167 ret = devm_request_threaded_irq(mti->dev, mti->irq, NULL, mt6360_irq, IRQF_ONESHOT,
168 dev_name(&pdev->dev), mti);
169 if (ret) {
170 dev_err(mti->dev, "Failed to register irq\n");
171 tcpci_unregister_port(mti->tcpci);
172 return ret;
173 }
174
175 device_init_wakeup(&pdev->dev, true);
176 platform_set_drvdata(pdev, mti);
177
178 return 0;
179 }
180
mt6360_tcpc_remove(struct platform_device * pdev)181 static void mt6360_tcpc_remove(struct platform_device *pdev)
182 {
183 struct mt6360_tcpc_info *mti = platform_get_drvdata(pdev);
184
185 disable_irq(mti->irq);
186 tcpci_unregister_port(mti->tcpci);
187 }
188
mt6360_tcpc_suspend(struct device * dev)189 static int __maybe_unused mt6360_tcpc_suspend(struct device *dev)
190 {
191 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
192
193 if (device_may_wakeup(dev))
194 enable_irq_wake(mti->irq);
195
196 return 0;
197 }
198
mt6360_tcpc_resume(struct device * dev)199 static int __maybe_unused mt6360_tcpc_resume(struct device *dev)
200 {
201 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
202
203 if (device_may_wakeup(dev))
204 disable_irq_wake(mti->irq);
205
206 return 0;
207 }
208
209 static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume);
210
211 static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = {
212 { .compatible = "mediatek,mt6360-tcpc", },
213 {},
214 };
215 MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id);
216
217 static struct platform_driver mt6360_tcpc_driver = {
218 .driver = {
219 .name = "mt6360-tcpc",
220 .pm = &mt6360_tcpc_pm_ops,
221 .of_match_table = mt6360_tcpc_of_id,
222 },
223 .probe = mt6360_tcpc_probe,
224 .remove_new = mt6360_tcpc_remove,
225 };
226 module_platform_driver(mt6360_tcpc_driver);
227
228 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
229 MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver");
230 MODULE_LICENSE("GPL v2");
231