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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/tcpm.h>
15
16#include "tcpci.h"
17
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
27
28
29#define MT6360_VCONNCL_ENABLE BIT(0)
30
31#define MT6360_OPEN40M_ENABLE BIT(7)
32
33#define MT6360_RPONESHOT_ENABLE BIT(6)
34
35struct mt6360_tcpc_info {
36 struct tcpci_data tdata;
37 struct tcpci *tcpci;
38 struct device *dev;
39 int irq;
40};
41
42static inline int mt6360_tcpc_read16(struct regmap *regmap,
43 unsigned int reg, u16 *val)
44{
45 return regmap_raw_read(regmap, reg, val, sizeof(u16));
46}
47
48static inline int mt6360_tcpc_write16(struct regmap *regmap,
49 unsigned int reg, u16 val)
50{
51 return regmap_raw_write(regmap, reg, &val, sizeof(u16));
52}
53
54static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata)
55{
56 struct regmap *regmap = tdata->regmap;
57 int ret;
58
59 ret = regmap_write(regmap, MT6360_REG_SWRESET, 0x01);
60 if (ret)
61 return ret;
62
63
64 usleep_range(1000, 2000);
65
66
67 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0);
68 if (ret)
69 return ret;
70
71
72 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F);
73 if (ret)
74 return ret;
75
76
77 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10);
78 if (ret)
79 return ret;
80
81
82 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4);
83 if (ret)
84 return ret;
85
86
87 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330);
88 if (ret)
89 return ret;
90
91
92 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE,
93 MT6360_VCONNCL_ENABLE);
94 if (ret)
95 return ret;
96
97
98 ret = regmap_update_bits(regmap, MT6360_REG_RXCTRL2, MT6360_OPEN40M_ENABLE,
99 MT6360_OPEN40M_ENABLE);
100 if (ret)
101 return ret;
102
103
104 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE,
105 MT6360_RPONESHOT_ENABLE);
106 if (ret)
107 return ret;
108
109
110 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A);
111}
112
113static irqreturn_t mt6360_irq(int irq, void *dev_id)
114{
115 struct mt6360_tcpc_info *mti = dev_id;
116
117 return tcpci_irq(mti->tcpci);
118}
119
120static int mt6360_tcpc_probe(struct platform_device *pdev)
121{
122 struct mt6360_tcpc_info *mti;
123 int ret;
124
125 mti = devm_kzalloc(&pdev->dev, sizeof(*mti), GFP_KERNEL);
126 if (!mti)
127 return -ENOMEM;
128
129 mti->dev = &pdev->dev;
130
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");
134 return -ENODEV;
135 }
136
137 mti->irq = platform_get_irq_byname(pdev, "PD_IRQB");
138 if (mti->irq < 0)
139 return mti->irq;
140
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);
146 }
147
148 ret = devm_request_threaded_irq(mti->dev, mti->irq, NULL, mt6360_irq, IRQF_ONESHOT,
149 dev_name(&pdev->dev), mti);
150 if (ret) {
151 dev_err(mti->dev, "Failed to register irq\n");
152 tcpci_unregister_port(mti->tcpci);
153 return ret;
154 }
155
156 device_init_wakeup(&pdev->dev, true);
157 platform_set_drvdata(pdev, mti);
158
159 return 0;
160}
161
162static int mt6360_tcpc_remove(struct platform_device *pdev)
163{
164 struct mt6360_tcpc_info *mti = platform_get_drvdata(pdev);
165
166 disable_irq(mti->irq);
167 tcpci_unregister_port(mti->tcpci);
168 return 0;
169}
170
171static int __maybe_unused mt6360_tcpc_suspend(struct device *dev)
172{
173 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
174
175 if (device_may_wakeup(dev))
176 enable_irq_wake(mti->irq);
177
178 return 0;
179}
180
181static int __maybe_unused mt6360_tcpc_resume(struct device *dev)
182{
183 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev);
184
185 if (device_may_wakeup(dev))
186 disable_irq_wake(mti->irq);
187
188 return 0;
189}
190
191static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume);
192
193static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = {
194 { .compatible = "mediatek,mt6360-tcpc", },
195 {},
196};
197MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id);
198
199static struct platform_driver mt6360_tcpc_driver = {
200 .driver = {
201 .name = "mt6360-tcpc",
202 .pm = &mt6360_tcpc_pm_ops,
203 .of_match_table = mt6360_tcpc_of_id,
204 },
205 .probe = mt6360_tcpc_probe,
206 .remove = mt6360_tcpc_remove,
207};
208module_platform_driver(mt6360_tcpc_driver);
209
210MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
211MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver");
212MODULE_LICENSE("GPL v2");
213
