| Message ID | 20220805070610.3516-9-peterwu.pub@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add MediaTek MT6370 PMIC support | expand |
On Fri, Aug 5, 2022 at 9:07 AM ChiaEn Wu <peterwu.pub@gmail.com> wrote: > > From: ChiYuan Huang <cy_huang@richtek.com> > > The MediaTek MT6370 is a highly-integrated smart power management IC, > which includes a single cell Li-Ion/Li-Polymer switching battery > charger, a USB Type-C & Power Delivery (PD) controller, dual > Flash LED current sources, a RGB LED driver, a backlight WLED driver, > a display bias driver and a general LDO for portable devices. > > Add a support for the Type-C & Power Delivery controller in > MediaTek MT6370 IC. Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Reviewed-by: Guenter Roeck <linux@roeck-us.net> > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com> > --- > > v7 > - Revise 'devm_add_action_or_reset(dev, ...)' to one line > - Revise 'return regmap_update_bits(...)' with using positive > conditional > --- > drivers/usb/typec/tcpm/Kconfig | 11 ++ > drivers/usb/typec/tcpm/Makefile | 1 + > drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++++++++++++++++++++++++++++++++ > 3 files changed, 219 insertions(+) > create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c > > diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig > index 073fd2e..e6b88ca 100644 > --- a/drivers/usb/typec/tcpm/Kconfig > +++ b/drivers/usb/typec/tcpm/Kconfig > @@ -35,6 +35,17 @@ config TYPEC_MT6360 > USB Type-C. It works with Type-C Port Controller Manager > to provide USB PD and USB Type-C functionalities. > > +config TYPEC_TCPCI_MT6370 > + tristate "MediaTek MT6370 Type-C driver" > + depends on MFD_MT6370 > + help > + MediaTek MT6370 is a multi-functional IC that includes > + USB Type-C. It works with Type-C Port Controller Manager > + to provide USB PD and USB Type-C functionalities. > + > + This driver can also be built as a module. The module > + will be called "tcpci_mt6370". > + > config TYPEC_TCPCI_MAXIM > tristate "Maxim TCPCI based Type-C chip driver" > help > diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile > index 7d499f3..906d9dc 100644 > --- a/drivers/usb/typec/tcpm/Makefile > +++ b/drivers/usb/typec/tcpm/Makefile > @@ -6,4 +6,5 @@ typec_wcove-y := wcove.o > obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o > obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o > obj-$(CONFIG_TYPEC_MT6360) += tcpci_mt6360.o > +obj-$(CONFIG_TYPEC_TCPCI_MT6370) += tcpci_mt6370.o > obj-$(CONFIG_TYPEC_TCPCI_MAXIM) += tcpci_maxim.o > diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c > new file mode 100644 > index 0000000..c5bb201 > --- /dev/null > +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c > @@ -0,0 +1,207 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2022 Richtek Technology Corp. > + * > + * Author: ChiYuan Huang <cy_huang@richtek.com> > + */ > + > +#include <linux/bits.h> > +#include <linux/interrupt.h> > +#include <linux/kernel.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/pm_wakeup.h> > +#include <linux/pm_wakeirq.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > +#include <linux/usb/tcpci.h> > +#include <linux/usb/tcpm.h> > + > +#define MT6370_REG_SYSCTRL8 0x9B > + > +#define MT6370_AUTOIDLE_MASK BIT(3) > + > +#define MT6370_VENDOR_ID 0x29CF > +#define MT6370_TCPC_DID_A 0x2170 > + > +struct mt6370_priv { > + struct device *dev; > + struct regulator *vbus; > + struct tcpci *tcpci; > + struct tcpci_data tcpci_data; > +}; > + > +static const struct reg_sequence mt6370_reg_init[] = { > + REG_SEQ(0xA0, 0x1, 1000), > + REG_SEQ(0x81, 0x38, 0), > + REG_SEQ(0x82, 0x82, 0), > + REG_SEQ(0xBA, 0xFC, 0), > + REG_SEQ(0xBB, 0x50, 0), > + REG_SEQ(0x9E, 0x8F, 0), > + REG_SEQ(0xA1, 0x5, 0), > + REG_SEQ(0xA2, 0x4, 0), > + REG_SEQ(0xA3, 0x4A, 0), > + REG_SEQ(0xA4, 0x01, 0), > + REG_SEQ(0x95, 0x01, 0), > + REG_SEQ(0x80, 0x71, 0), > + REG_SEQ(0x9B, 0x3A, 1000), > +}; > + > +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data) > +{ > + u16 did; > + int ret; > + > + ret = regmap_register_patch(data->regmap, mt6370_reg_init, > + ARRAY_SIZE(mt6370_reg_init)); > + if (ret) > + return ret; > + > + ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16)); > + if (ret) > + return ret; > + > + if (did == MT6370_TCPC_DID_A) > + return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80); > + > + return 0; > +} > + > +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data, > + bool enable) > +{ > + return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8, > + MT6370_AUTOIDLE_MASK, > + enable ? 0 : MT6370_AUTOIDLE_MASK); > +} > + > +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data, > + bool source, bool sink) > +{ > + struct mt6370_priv *priv = container_of(data, struct mt6370_priv, > + tcpci_data); > + int ret; > + > + ret = regulator_is_enabled(priv->vbus); > + if (ret < 0) > + return ret; > + > + if (ret && !source) > + return regulator_disable(priv->vbus); > + > + if (!ret && source) > + return regulator_enable(priv->vbus); > + > + return 0; > +} > + > +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id) > +{ > + struct mt6370_priv *priv = dev_id; > + > + return tcpci_irq(priv->tcpci); > +} > + > +static int mt6370_check_vendor_info(struct mt6370_priv *priv) > +{ > + struct regmap *regmap = priv->tcpci_data.regmap; > + u16 vid; > + int ret; > + > + ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16)); > + if (ret) > + return ret; > + > + if (vid != MT6370_VENDOR_ID) > + return dev_err_probe(priv->dev, -ENODEV, > + "Vendor ID not correct 0x%02x\n", vid); > + > + return 0; > +} > + > +static void mt6370_unregister_tcpci_port(void *tcpci) > +{ > + tcpci_unregister_port(tcpci); > +} > + > +static int mt6370_tcpc_probe(struct platform_device *pdev) > +{ > + struct mt6370_priv *priv; > + struct device *dev = &pdev->dev; > + int irq, ret; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->dev = dev; > + > + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); > + if (!priv->tcpci_data.regmap) > + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); > + > + ret = mt6370_check_vendor_info(priv); > + if (ret) > + return ret; > + > + irq = platform_get_irq(pdev, 0); > + if (irq < 0) > + return dev_err_probe(dev, irq, "Failed to get irq\n"); > + > + /* Assign TCPCI feature and ops */ > + priv->tcpci_data.auto_discharge_disconnect = 1; > + priv->tcpci_data.init = mt6370_tcpc_init; > + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; > + > + priv->vbus = devm_regulator_get_optional(dev, "vbus"); > + if (!IS_ERR(priv->vbus)) > + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; > + > + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); > + if (IS_ERR(priv->tcpci)) > + return dev_err_probe(dev, PTR_ERR(priv->tcpci), > + "Failed to register tcpci port\n"); > + > + ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci); > + if (ret) > + return ret; > + > + ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler, > + IRQF_ONESHOT, dev_name(dev), priv); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > + > + device_init_wakeup(dev, true); > + dev_pm_set_wake_irq(dev, irq); > + > + return 0; > +} > + > +static int mt6370_tcpc_remove(struct platform_device *pdev) > +{ > + dev_pm_clear_wake_irq(&pdev->dev); > + device_init_wakeup(&pdev->dev, false); > + > + return 0; > +} > + > +static const struct of_device_id mt6370_tcpc_devid_table[] = { > + { .compatible = "mediatek,mt6370-tcpc" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table); > + > +static struct platform_driver mt6370_tcpc_driver = { > + .driver = { > + .name = "mt6370-tcpc", > + .of_match_table = mt6370_tcpc_devid_table, > + }, > + .probe = mt6370_tcpc_probe, > + .remove = mt6370_tcpc_remove, > +}; > +module_platform_driver(mt6370_tcpc_driver); > + > +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); > +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.7.4 >
On Fri, Aug 05, 2022 at 03:06:05PM +0800, ChiaEn Wu wrote: > From: ChiYuan Huang <cy_huang@richtek.com> > > The MediaTek MT6370 is a highly-integrated smart power management IC, > which includes a single cell Li-Ion/Li-Polymer switching battery > charger, a USB Type-C & Power Delivery (PD) controller, dual > Flash LED current sources, a RGB LED driver, a backlight WLED driver, > a display bias driver and a general LDO for portable devices. > > Add a support for the Type-C & Power Delivery controller in > MediaTek MT6370 IC. > > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Reviewed-by: Guenter Roeck <linux@roeck-us.net> > Signed-off-by: ChiYuan Huang <cy_huang@richtek.com> > Signed-off-by: ChiaEn Wu <chiaen_wu@richtek.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > > v7 > - Revise 'devm_add_action_or_reset(dev, ...)' to one line > - Revise 'return regmap_update_bits(...)' with using positive > conditional > --- > drivers/usb/typec/tcpm/Kconfig | 11 ++ > drivers/usb/typec/tcpm/Makefile | 1 + > drivers/usb/typec/tcpm/tcpci_mt6370.c | 207 ++++++++++++++++++++++++++++++++++ > 3 files changed, 219 insertions(+) > create mode 100644 drivers/usb/typec/tcpm/tcpci_mt6370.c > > diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig > index 073fd2e..e6b88ca 100644 > --- a/drivers/usb/typec/tcpm/Kconfig > +++ b/drivers/usb/typec/tcpm/Kconfig > @@ -35,6 +35,17 @@ config TYPEC_MT6360 > USB Type-C. It works with Type-C Port Controller Manager > to provide USB PD and USB Type-C functionalities. > > +config TYPEC_TCPCI_MT6370 > + tristate "MediaTek MT6370 Type-C driver" > + depends on MFD_MT6370 > + help > + MediaTek MT6370 is a multi-functional IC that includes > + USB Type-C. It works with Type-C Port Controller Manager > + to provide USB PD and USB Type-C functionalities. > + > + This driver can also be built as a module. The module > + will be called "tcpci_mt6370". > + > config TYPEC_TCPCI_MAXIM > tristate "Maxim TCPCI based Type-C chip driver" > help > diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile > index 7d499f3..906d9dc 100644 > --- a/drivers/usb/typec/tcpm/Makefile > +++ b/drivers/usb/typec/tcpm/Makefile > @@ -6,4 +6,5 @@ typec_wcove-y := wcove.o > obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o > obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o > obj-$(CONFIG_TYPEC_MT6360) += tcpci_mt6360.o > +obj-$(CONFIG_TYPEC_TCPCI_MT6370) += tcpci_mt6370.o > obj-$(CONFIG_TYPEC_TCPCI_MAXIM) += tcpci_maxim.o > diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c > new file mode 100644 > index 0000000..c5bb201 > --- /dev/null > +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c > @@ -0,0 +1,207 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +/* > + * Copyright (C) 2022 Richtek Technology Corp. > + * > + * Author: ChiYuan Huang <cy_huang@richtek.com> > + */ > + > +#include <linux/bits.h> > +#include <linux/interrupt.h> > +#include <linux/kernel.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/pm_wakeup.h> > +#include <linux/pm_wakeirq.h> > +#include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > +#include <linux/usb/tcpci.h> > +#include <linux/usb/tcpm.h> > + > +#define MT6370_REG_SYSCTRL8 0x9B > + > +#define MT6370_AUTOIDLE_MASK BIT(3) > + > +#define MT6370_VENDOR_ID 0x29CF > +#define MT6370_TCPC_DID_A 0x2170 > + > +struct mt6370_priv { > + struct device *dev; > + struct regulator *vbus; > + struct tcpci *tcpci; > + struct tcpci_data tcpci_data; > +}; > + > +static const struct reg_sequence mt6370_reg_init[] = { > + REG_SEQ(0xA0, 0x1, 1000), > + REG_SEQ(0x81, 0x38, 0), > + REG_SEQ(0x82, 0x82, 0), > + REG_SEQ(0xBA, 0xFC, 0), > + REG_SEQ(0xBB, 0x50, 0), > + REG_SEQ(0x9E, 0x8F, 0), > + REG_SEQ(0xA1, 0x5, 0), > + REG_SEQ(0xA2, 0x4, 0), > + REG_SEQ(0xA3, 0x4A, 0), > + REG_SEQ(0xA4, 0x01, 0), > + REG_SEQ(0x95, 0x01, 0), > + REG_SEQ(0x80, 0x71, 0), > + REG_SEQ(0x9B, 0x3A, 1000), > +}; > + > +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data) > +{ > + u16 did; > + int ret; > + > + ret = regmap_register_patch(data->regmap, mt6370_reg_init, > + ARRAY_SIZE(mt6370_reg_init)); > + if (ret) > + return ret; > + > + ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16)); > + if (ret) > + return ret; > + > + if (did == MT6370_TCPC_DID_A) > + return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80); > + > + return 0; > +} > + > +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data, > + bool enable) > +{ > + return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8, > + MT6370_AUTOIDLE_MASK, > + enable ? 0 : MT6370_AUTOIDLE_MASK); > +} > + > +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data, > + bool source, bool sink) > +{ > + struct mt6370_priv *priv = container_of(data, struct mt6370_priv, > + tcpci_data); > + int ret; > + > + ret = regulator_is_enabled(priv->vbus); > + if (ret < 0) > + return ret; > + > + if (ret && !source) > + return regulator_disable(priv->vbus); > + > + if (!ret && source) > + return regulator_enable(priv->vbus); > + > + return 0; > +} > + > +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id) > +{ > + struct mt6370_priv *priv = dev_id; > + > + return tcpci_irq(priv->tcpci); > +} > + > +static int mt6370_check_vendor_info(struct mt6370_priv *priv) > +{ > + struct regmap *regmap = priv->tcpci_data.regmap; > + u16 vid; > + int ret; > + > + ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16)); > + if (ret) > + return ret; > + > + if (vid != MT6370_VENDOR_ID) > + return dev_err_probe(priv->dev, -ENODEV, > + "Vendor ID not correct 0x%02x\n", vid); > + > + return 0; > +} > + > +static void mt6370_unregister_tcpci_port(void *tcpci) > +{ > + tcpci_unregister_port(tcpci); > +} > + > +static int mt6370_tcpc_probe(struct platform_device *pdev) > +{ > + struct mt6370_priv *priv; > + struct device *dev = &pdev->dev; > + int irq, ret; > + > + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); > + if (!priv) > + return -ENOMEM; > + > + priv->dev = dev; > + > + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); > + if (!priv->tcpci_data.regmap) > + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); > + > + ret = mt6370_check_vendor_info(priv); > + if (ret) > + return ret; > + > + irq = platform_get_irq(pdev, 0); > + if (irq < 0) > + return dev_err_probe(dev, irq, "Failed to get irq\n"); > + > + /* Assign TCPCI feature and ops */ > + priv->tcpci_data.auto_discharge_disconnect = 1; > + priv->tcpci_data.init = mt6370_tcpc_init; > + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; > + > + priv->vbus = devm_regulator_get_optional(dev, "vbus"); > + if (!IS_ERR(priv->vbus)) > + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; > + > + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); > + if (IS_ERR(priv->tcpci)) > + return dev_err_probe(dev, PTR_ERR(priv->tcpci), > + "Failed to register tcpci port\n"); > + > + ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci); > + if (ret) > + return ret; > + > + ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler, > + IRQF_ONESHOT, dev_name(dev), priv); > + if (ret) > + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); > + > + device_init_wakeup(dev, true); > + dev_pm_set_wake_irq(dev, irq); > + > + return 0; > +} > + > +static int mt6370_tcpc_remove(struct platform_device *pdev) > +{ > + dev_pm_clear_wake_irq(&pdev->dev); > + device_init_wakeup(&pdev->dev, false); > + > + return 0; > +} > + > +static const struct of_device_id mt6370_tcpc_devid_table[] = { > + { .compatible = "mediatek,mt6370-tcpc" }, > + {} > +}; > +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table); > + > +static struct platform_driver mt6370_tcpc_driver = { > + .driver = { > + .name = "mt6370-tcpc", > + .of_match_table = mt6370_tcpc_devid_table, > + }, > + .probe = mt6370_tcpc_probe, > + .remove = mt6370_tcpc_remove, > +}; > +module_platform_driver(mt6370_tcpc_driver); > + > +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); > +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver"); > +MODULE_LICENSE("GPL v2"); > -- > 2.7.4
diff --git a/drivers/usb/typec/tcpm/Kconfig b/drivers/usb/typec/tcpm/Kconfig index 073fd2e..e6b88ca 100644 --- a/drivers/usb/typec/tcpm/Kconfig +++ b/drivers/usb/typec/tcpm/Kconfig @@ -35,6 +35,17 @@ config TYPEC_MT6360 USB Type-C. It works with Type-C Port Controller Manager to provide USB PD and USB Type-C functionalities. +config TYPEC_TCPCI_MT6370 + tristate "MediaTek MT6370 Type-C driver" + depends on MFD_MT6370 + help + MediaTek MT6370 is a multi-functional IC that includes + USB Type-C. It works with Type-C Port Controller Manager + to provide USB PD and USB Type-C functionalities. + + This driver can also be built as a module. The module + will be called "tcpci_mt6370". + config TYPEC_TCPCI_MAXIM tristate "Maxim TCPCI based Type-C chip driver" help diff --git a/drivers/usb/typec/tcpm/Makefile b/drivers/usb/typec/tcpm/Makefile index 7d499f3..906d9dc 100644 --- a/drivers/usb/typec/tcpm/Makefile +++ b/drivers/usb/typec/tcpm/Makefile @@ -6,4 +6,5 @@ typec_wcove-y := wcove.o obj-$(CONFIG_TYPEC_TCPCI) += tcpci.o obj-$(CONFIG_TYPEC_RT1711H) += tcpci_rt1711h.o obj-$(CONFIG_TYPEC_MT6360) += tcpci_mt6360.o +obj-$(CONFIG_TYPEC_TCPCI_MT6370) += tcpci_mt6370.o obj-$(CONFIG_TYPEC_TCPCI_MAXIM) += tcpci_maxim.o diff --git a/drivers/usb/typec/tcpm/tcpci_mt6370.c b/drivers/usb/typec/tcpm/tcpci_mt6370.c new file mode 100644 index 0000000..c5bb201 --- /dev/null +++ b/drivers/usb/typec/tcpm/tcpci_mt6370.c @@ -0,0 +1,207 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2022 Richtek Technology Corp. + * + * Author: ChiYuan Huang <cy_huang@richtek.com> + */ + +#include <linux/bits.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/pm_wakeup.h> +#include <linux/pm_wakeirq.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/usb/tcpci.h> +#include <linux/usb/tcpm.h> + +#define MT6370_REG_SYSCTRL8 0x9B + +#define MT6370_AUTOIDLE_MASK BIT(3) + +#define MT6370_VENDOR_ID 0x29CF +#define MT6370_TCPC_DID_A 0x2170 + +struct mt6370_priv { + struct device *dev; + struct regulator *vbus; + struct tcpci *tcpci; + struct tcpci_data tcpci_data; +}; + +static const struct reg_sequence mt6370_reg_init[] = { + REG_SEQ(0xA0, 0x1, 1000), + REG_SEQ(0x81, 0x38, 0), + REG_SEQ(0x82, 0x82, 0), + REG_SEQ(0xBA, 0xFC, 0), + REG_SEQ(0xBB, 0x50, 0), + REG_SEQ(0x9E, 0x8F, 0), + REG_SEQ(0xA1, 0x5, 0), + REG_SEQ(0xA2, 0x4, 0), + REG_SEQ(0xA3, 0x4A, 0), + REG_SEQ(0xA4, 0x01, 0), + REG_SEQ(0x95, 0x01, 0), + REG_SEQ(0x80, 0x71, 0), + REG_SEQ(0x9B, 0x3A, 1000), +}; + +static int mt6370_tcpc_init(struct tcpci *tcpci, struct tcpci_data *data) +{ + u16 did; + int ret; + + ret = regmap_register_patch(data->regmap, mt6370_reg_init, + ARRAY_SIZE(mt6370_reg_init)); + if (ret) + return ret; + + ret = regmap_raw_read(data->regmap, TCPC_BCD_DEV, &did, sizeof(u16)); + if (ret) + return ret; + + if (did == MT6370_TCPC_DID_A) + return regmap_write(data->regmap, TCPC_FAULT_CTRL, 0x80); + + return 0; +} + +static int mt6370_tcpc_set_vconn(struct tcpci *tcpci, struct tcpci_data *data, + bool enable) +{ + return regmap_update_bits(data->regmap, MT6370_REG_SYSCTRL8, + MT6370_AUTOIDLE_MASK, + enable ? 0 : MT6370_AUTOIDLE_MASK); +} + +static int mt6370_tcpc_set_vbus(struct tcpci *tcpci, struct tcpci_data *data, + bool source, bool sink) +{ + struct mt6370_priv *priv = container_of(data, struct mt6370_priv, + tcpci_data); + int ret; + + ret = regulator_is_enabled(priv->vbus); + if (ret < 0) + return ret; + + if (ret && !source) + return regulator_disable(priv->vbus); + + if (!ret && source) + return regulator_enable(priv->vbus); + + return 0; +} + +static irqreturn_t mt6370_irq_handler(int irq, void *dev_id) +{ + struct mt6370_priv *priv = dev_id; + + return tcpci_irq(priv->tcpci); +} + +static int mt6370_check_vendor_info(struct mt6370_priv *priv) +{ + struct regmap *regmap = priv->tcpci_data.regmap; + u16 vid; + int ret; + + ret = regmap_raw_read(regmap, TCPC_VENDOR_ID, &vid, sizeof(u16)); + if (ret) + return ret; + + if (vid != MT6370_VENDOR_ID) + return dev_err_probe(priv->dev, -ENODEV, + "Vendor ID not correct 0x%02x\n", vid); + + return 0; +} + +static void mt6370_unregister_tcpci_port(void *tcpci) +{ + tcpci_unregister_port(tcpci); +} + +static int mt6370_tcpc_probe(struct platform_device *pdev) +{ + struct mt6370_priv *priv; + struct device *dev = &pdev->dev; + int irq, ret; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->dev = dev; + + priv->tcpci_data.regmap = dev_get_regmap(dev->parent, NULL); + if (!priv->tcpci_data.regmap) + return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n"); + + ret = mt6370_check_vendor_info(priv); + if (ret) + return ret; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return dev_err_probe(dev, irq, "Failed to get irq\n"); + + /* Assign TCPCI feature and ops */ + priv->tcpci_data.auto_discharge_disconnect = 1; + priv->tcpci_data.init = mt6370_tcpc_init; + priv->tcpci_data.set_vconn = mt6370_tcpc_set_vconn; + + priv->vbus = devm_regulator_get_optional(dev, "vbus"); + if (!IS_ERR(priv->vbus)) + priv->tcpci_data.set_vbus = mt6370_tcpc_set_vbus; + + priv->tcpci = tcpci_register_port(dev, &priv->tcpci_data); + if (IS_ERR(priv->tcpci)) + return dev_err_probe(dev, PTR_ERR(priv->tcpci), + "Failed to register tcpci port\n"); + + ret = devm_add_action_or_reset(dev, mt6370_unregister_tcpci_port, priv->tcpci); + if (ret) + return ret; + + ret = devm_request_threaded_irq(dev, irq, NULL, mt6370_irq_handler, + IRQF_ONESHOT, dev_name(dev), priv); + if (ret) + return dev_err_probe(dev, ret, "Failed to allocate irq\n"); + + device_init_wakeup(dev, true); + dev_pm_set_wake_irq(dev, irq); + + return 0; +} + +static int mt6370_tcpc_remove(struct platform_device *pdev) +{ + dev_pm_clear_wake_irq(&pdev->dev); + device_init_wakeup(&pdev->dev, false); + + return 0; +} + +static const struct of_device_id mt6370_tcpc_devid_table[] = { + { .compatible = "mediatek,mt6370-tcpc" }, + {} +}; +MODULE_DEVICE_TABLE(of, mt6370_tcpc_devid_table); + +static struct platform_driver mt6370_tcpc_driver = { + .driver = { + .name = "mt6370-tcpc", + .of_match_table = mt6370_tcpc_devid_table, + }, + .probe = mt6370_tcpc_probe, + .remove = mt6370_tcpc_remove, +}; +module_platform_driver(mt6370_tcpc_driver); + +MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); +MODULE_DESCRIPTION("MT6370 USB Type-C Port Controller Interface Driver"); +MODULE_LICENSE("GPL v2");