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 46 static inline int mt6360_tcpc_read16(struct regmap *regmap, 47 unsigned int reg, u16 *val) 48 { 49 return regmap_raw_read(regmap, reg, val, sizeof(u16)); 50 } 51 52 static inline int mt6360_tcpc_write16(struct regmap *regmap, 53 unsigned int reg, u16 val) 54 { 55 return regmap_raw_write(regmap, reg, &val, sizeof(u16)); 56 } 57 58 static int mt6360_tcpc_init(struct tcpci *tcpci, struct tcpci_data *tdata) 59 { 60 struct regmap *regmap = tdata->regmap; 61 int ret; 62 63 ret = regmap_write(regmap, MT6360_REG_SWRESET, 0x01); 64 if (ret) 65 return ret; 66 67 /* after reset command, wait 1~2ms to wait IC action */ 68 usleep_range(1000, 2000); 69 70 /* write all alert to masked */ 71 ret = mt6360_tcpc_write16(regmap, TCPC_ALERT_MASK, 0); 72 if (ret) 73 return ret; 74 75 /* config I2C timeout reset enable , and timeout to 200ms */ 76 ret = regmap_write(regmap, MT6360_REG_I2CTORST, 0x8F); 77 if (ret) 78 return ret; 79 80 /* config CC Detect Debounce : 26.7*val us */ 81 ret = regmap_write(regmap, MT6360_REG_DEBCTRL1, 0x10); 82 if (ret) 83 return ret; 84 85 /* DRP Toggle Cycle : 51.2 + 6.4*val ms */ 86 ret = regmap_write(regmap, MT6360_REG_DRPCTRL1, 4); 87 if (ret) 88 return ret; 89 90 /* DRP Duyt Ctrl : dcSRC: /1024 */ 91 ret = mt6360_tcpc_write16(regmap, MT6360_REG_DRPCTRL2, 330); 92 if (ret) 93 return ret; 94 95 /* Enable VCONN Current Limit function */ 96 ret = regmap_update_bits(regmap, MT6360_REG_VCONNCTRL1, MT6360_VCONNCL_ENABLE, 97 MT6360_VCONNCL_ENABLE); 98 if (ret) 99 return ret; 100 101 /* Enable cc open 40ms when pmic send vsysuv signal */ 102 ret = regmap_update_bits(regmap, MT6360_REG_RXCTRL2, MT6360_OPEN40M_ENABLE, 103 MT6360_OPEN40M_ENABLE); 104 if (ret) 105 return ret; 106 107 /* Enable Rpdet oneshot detection */ 108 ret = regmap_update_bits(regmap, MT6360_REG_CTDCTRL2, MT6360_RPONESHOT_ENABLE, 109 MT6360_RPONESHOT_ENABLE); 110 if (ret) 111 return ret; 112 113 /* BMC PHY */ 114 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL1, 0x3A70); 115 if (ret) 116 return ret; 117 118 ret = regmap_write(regmap, MT6360_REG_PHYCTRL3, 0x82); 119 if (ret) 120 return ret; 121 122 ret = regmap_write(regmap, MT6360_REG_PHYCTRL7, 0x36); 123 if (ret) 124 return ret; 125 126 ret = mt6360_tcpc_write16(regmap, MT6360_REG_PHYCTRL11, 0x3C60); 127 if (ret) 128 return ret; 129 130 ret = regmap_write(regmap, MT6360_REG_RXCTRL1, 0xE8); 131 if (ret) 132 return ret; 133 134 /* Set shipping mode off, AUTOIDLE on */ 135 return regmap_write(regmap, MT6360_REG_MODECTRL2, 0x7A); 136 } 137 138 static irqreturn_t mt6360_irq(int irq, void *dev_id) 139 { 140 struct mt6360_tcpc_info *mti = dev_id; 141 142 return tcpci_irq(mti->tcpci); 143 } 144 145 static int mt6360_tcpc_probe(struct platform_device *pdev) 146 { 147 struct mt6360_tcpc_info *mti; 148 int ret; 149 150 mti = devm_kzalloc(&pdev->dev, sizeof(*mti), GFP_KERNEL); 151 if (!mti) 152 return -ENOMEM; 153 154 mti->dev = &pdev->dev; 155 156 mti->tdata.regmap = dev_get_regmap(pdev->dev.parent, NULL); 157 if (!mti->tdata.regmap) { 158 dev_err(&pdev->dev, "Failed to get parent regmap\n"); 159 return -ENODEV; 160 } 161 162 mti->irq = platform_get_irq_byname(pdev, "PD_IRQB"); 163 if (mti->irq < 0) 164 return mti->irq; 165 166 mti->tdata.init = mt6360_tcpc_init; 167 mti->tcpci = tcpci_register_port(&pdev->dev, &mti->tdata); 168 if (IS_ERR(mti->tcpci)) { 169 dev_err(&pdev->dev, "Failed to register tcpci port\n"); 170 return PTR_ERR(mti->tcpci); 171 } 172 173 ret = devm_request_threaded_irq(mti->dev, mti->irq, NULL, mt6360_irq, IRQF_ONESHOT, 174 dev_name(&pdev->dev), mti); 175 if (ret) { 176 dev_err(mti->dev, "Failed to register irq\n"); 177 tcpci_unregister_port(mti->tcpci); 178 return ret; 179 } 180 181 device_init_wakeup(&pdev->dev, true); 182 platform_set_drvdata(pdev, mti); 183 184 return 0; 185 } 186 187 static int mt6360_tcpc_remove(struct platform_device *pdev) 188 { 189 struct mt6360_tcpc_info *mti = platform_get_drvdata(pdev); 190 191 disable_irq(mti->irq); 192 tcpci_unregister_port(mti->tcpci); 193 return 0; 194 } 195 196 static int __maybe_unused mt6360_tcpc_suspend(struct device *dev) 197 { 198 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev); 199 200 if (device_may_wakeup(dev)) 201 enable_irq_wake(mti->irq); 202 203 return 0; 204 } 205 206 static int __maybe_unused mt6360_tcpc_resume(struct device *dev) 207 { 208 struct mt6360_tcpc_info *mti = dev_get_drvdata(dev); 209 210 if (device_may_wakeup(dev)) 211 disable_irq_wake(mti->irq); 212 213 return 0; 214 } 215 216 static SIMPLE_DEV_PM_OPS(mt6360_tcpc_pm_ops, mt6360_tcpc_suspend, mt6360_tcpc_resume); 217 218 static const struct of_device_id __maybe_unused mt6360_tcpc_of_id[] = { 219 { .compatible = "mediatek,mt6360-tcpc", }, 220 {}, 221 }; 222 MODULE_DEVICE_TABLE(of, mt6360_tcpc_of_id); 223 224 static struct platform_driver mt6360_tcpc_driver = { 225 .driver = { 226 .name = "mt6360-tcpc", 227 .pm = &mt6360_tcpc_pm_ops, 228 .of_match_table = mt6360_tcpc_of_id, 229 }, 230 .probe = mt6360_tcpc_probe, 231 .remove = mt6360_tcpc_remove, 232 }; 233 module_platform_driver(mt6360_tcpc_driver); 234 235 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 236 MODULE_DESCRIPTION("MT6360 USB Type-C Port Controller Interface Driver"); 237 MODULE_LICENSE("GPL v2"); 238