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/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 /* 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) 34 35 struct mt6360_tcpc_info { 36 struct tcpci_data tdata; 37 struct tcpci *tcpci; 38 struct device *dev; 39 int irq; 40 }; 41 42 static 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 48 static 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 54 static 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 /* after reset command, wait 1~2ms to wait IC action */ 64 usleep_range(1000, 2000); 65 66 /* write all alert to masked */ 67 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0); 68 if (ret) 69 return ret; 70 71 /* config I2C timeout reset enable , and timeout to 200ms */ 72 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F); 73 if (ret) 74 return ret; 75 76 /* config CC Detect Debounce : 26.7*val us */ 77 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10); 78 if (ret) 79 return ret; 80 81 /* DRP Toggle Cycle : 51.2 + 6.4*val ms */ 82 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4); 83 if (ret) 84 return ret; 85 86 /* DRP Duyt Ctrl : dcSRC: /1024 */ 87 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330); 88 if (ret) 89 return ret; 90 91 /* Enable VCONN Current Limit function */ 92 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE, 93 MT6360_VCONNCL_ENABLE); 94 if (ret) 95 return ret; 96 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); 100 if (ret) 101 return ret; 102 103 /* Enable Rpdet oneshot detection */ 104 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE, 105 MT6360_RPONESHOT_ENABLE); 106 if (ret) 107 return ret; 108 109 /* Set shipping mode off, AUTOIDLE on */ 110 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A); 111 } 112 113 static 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 } 119 120 static 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 } 161 162 static 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 } 170 171 static 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 } 180 181 static 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 } 190 191 static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume); 192 193 static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = { 194 { .compatible = "mediatek,mt6360-tcpc", }, 195 {}, 196 }; 197 MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id); 198 199 static 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 }; 208 module_platform_driver(mt6360_tcpc_driver); 209 210 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 211 MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver"); 212 MODULE_LICENSE("GPL v2"); 213