tcpci_mt6360.c

  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
 39struct mt6360_tcpc_info {
 40	struct tcpci_data tdata;
 41	struct tcpci *tcpci;
 42	struct device *dev;
 43	int irq;
 44};
 45
 46static 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
 52static 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
132static 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
139static 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
181static 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
189static 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
199static 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
209static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume);
210
211static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = {
212	{ .compatible = "mediatek,mt6360-tcpc", },
213	{},
214};
215MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id);
216
217static 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 = mt6360_tcpc_remove,
225};
226module_platform_driver(mt6360_tcpc_driver);
227
228MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
229MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver");
230MODULE_LICENSE("GPL v2");