Loading Documentation/devicetree/bindings/misc/usb-type-c.txt 0 → 100644 +27 −0 Original line number Diff line number Diff line USB Type-C Detection Chip Required properties : - compatible : Must be "pericom,usb-type-c" - reg: 7bit I2C slave address - interrupt-parent: Should be phandle for the interrupt controller that services interrupts for this device. - interrupt: IRQ line Optional properties: - pinctrl-names : This should be defined if a target uses pinctrl framework for INT_N pin. See "pinctrl" in Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt. It should specify the names of the configs that pinctrl can install in driver. Following are the pinctrl config that can be installed: "usbc_int_default" : Default configuration of INT_N pin. Example : pericom-type-c@3d { compatible = "pericom,usb-type-c"; reg = <0x3d>; interrupt-parent = <&msm_gpio>; interrupts = <102 0>; /* MSM GPIO 102 */ pinctrl-names = "default"; pinctrl-0 = <&usbc_int_default>; }; Documentation/devicetree/bindings/vendor-prefixes.txt +1 −0 Original line number Diff line number Diff line Loading @@ -127,6 +127,7 @@ onnn ON Semiconductor Corp. opencores OpenCores.org ovti OmniVision Technologies, Inc. panasonic Panasonic Corporation pericom Pericom Semiconductor Corp. phytec PHYTEC Messtechnik GmbH picochip Picochip Ltd plathome Plat'Home Co., Ltd. Loading drivers/misc/Kconfig +10 −0 Original line number Diff line number Diff line Loading @@ -541,6 +541,16 @@ config UID_CPUTIME help Per UID based cpu time statistics exported to /proc/uid_cputime config USB_EXT_TYPE_C tristate "USB Type-C charger detection support using external chip" depends on I2C && POWER_SUPPLY help Enables support for the USB Type-C chargers using external chips connected using I2C. This adds support for detecting USB Type-C chargers that can supply upto 3A Vbus current for charging. config TI_DRV2667 tristate "TI's DRV2667 haptic controller support" depends on I2C Loading drivers/misc/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -65,3 +65,4 @@ obj-$(CONFIG_CXL_BASE) += cxl/ obj-$(CONFIG_UID_CPUTIME) += uid_cputime.o obj-y += qcom/ obj-$(CONFIG_TI_DRV2667) += ti_drv2667.o obj-$(CONFIG_USB_EXT_TYPE_C) += type-c-pericom.o drivers/misc/type-c-pericom.c 0 → 100644 +241 −0 Original line number Diff line number Diff line /* Copyright (c) 2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/i2c.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/power_supply.h> #define PERICOM_I2C_NAME "usb-type-c-pericom" #define CCD_DEFAULT 0x1 #define CCD_MEDIUM 0x2 #define CCD_HIGH 0x3 #define MAX_CURRENT_BC1P2 500 #define MAX_CURRENT_MEDIUM 1500 #define MAX_CURRENT_HIGH 3000 struct piusb_regs { u8 dev_id; u8 control; u8 intr_status; #define INTS_ATTACH 0x1 #define INTS_DETACH 0x2 #define INTS_ATTACH_MASK 0x3 /* current attach state interrupt */ u8 port_status; #define STS_PORT_MASK (0x1c) /* attached port status - device/host */ #define STS_CCD_MASK (0x60) /* charging current status */ #define STS_VBUS_MASK (0x80) /* vbus status */ } __packed; struct pi_usb_type_c { struct i2c_client *client; struct piusb_regs reg_data; struct power_supply *usb_psy; int max_current; bool attach_state; }; static struct pi_usb_type_c *pi_usb; static int piusb_read_regdata(struct i2c_client *i2c) { int rc; int data_length = sizeof(pi_usb->reg_data); uint16_t saddr = i2c->addr; u8 attach_state; struct i2c_msg msgs[] = { { .addr = saddr, .flags = I2C_M_RD, .len = data_length, .buf = (u8 *)&pi_usb->reg_data, } }; rc = i2c_transfer(i2c->adapter, msgs, 1); if (rc < 0) { /* i2c read may fail if type-c plug removed, treat as detach */ dev_dbg(&i2c->dev, "i2c read from 0x%x failed %d\n", saddr, rc); pi_usb->attach_state = false; return 0; } dev_dbg(&i2c->dev, "i2c read from 0x%x-[%x %x %x %x]\n", saddr, pi_usb->reg_data.dev_id, pi_usb->reg_data.control, pi_usb->reg_data.intr_status, pi_usb->reg_data.port_status); if (!pi_usb->reg_data.intr_status) { dev_err(&i2c->dev, "intr_status is 0!, ignore interrupt\n"); pi_usb->attach_state = false; return -EINVAL; } attach_state = pi_usb->reg_data.intr_status & INTS_ATTACH_MASK; pi_usb->attach_state = (attach_state == INTS_ATTACH) ? true : false; return rc; } static int piusb_update_power_supply(struct power_supply *psy, int limit) { const union power_supply_propval ret = {limit,}; /* Update USB of max charging current (500 corresponds to bc1.2 */ if (psy->set_property) return psy->set_property(psy, POWER_SUPPLY_PROP_INPUT_CURRENT_MAX, &ret); return -ENODEV; } static void piusb_update_max_current(struct pi_usb_type_c *pi_usb) { u8 mask = STS_CCD_MASK; u8 shift = find_first_bit((void *)&mask, 8); u8 chg_mode = pi_usb->reg_data.port_status & mask; chg_mode >>= shift; /* update to 0 if type-c detached */ if (!pi_usb->attach_state) { pi_usb->max_current = 0; return; } switch (chg_mode) { case CCD_DEFAULT: pi_usb->max_current = MAX_CURRENT_BC1P2; break; case CCD_MEDIUM: pi_usb->max_current = MAX_CURRENT_MEDIUM; break; case CCD_HIGH: pi_usb->max_current = MAX_CURRENT_HIGH; break; default: dev_dbg(&pi_usb->client->dev, "wrong chg mode %x\n", chg_mode); pi_usb->max_current = MAX_CURRENT_BC1P2; } dev_dbg(&pi_usb->client->dev, "chg mode: %x, mA:%u\n", chg_mode, pi_usb->max_current); } static irqreturn_t piusb_irq(int irq, void *data) { int ret; struct pi_usb_type_c *pi_usb = (struct pi_usb_type_c *)data; /* i2c register update takes time, 30msec sleep required as per HPG */ msleep(30); ret = piusb_read_regdata(pi_usb->client); if (ret < 0) goto out; piusb_update_max_current(pi_usb); ret = piusb_update_power_supply(pi_usb->usb_psy, pi_usb->max_current); if (ret < 0) dev_err(&pi_usb->client->dev, "failed to notify USB-%d\n", ret); out: return IRQ_HANDLED; } static int piusb_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { int ret; struct power_supply *usb_psy; usb_psy = power_supply_get_by_name("usb"); if (!usb_psy) { dev_dbg(&i2c->dev, "USB power_supply not found, defer probe\n"); return -EPROBE_DEFER; } pi_usb = devm_kzalloc(&i2c->dev, sizeof(struct pi_usb_type_c), GFP_KERNEL); if (!pi_usb) return -ENOMEM; i2c_set_clientdata(i2c, pi_usb); pi_usb->client = i2c; pi_usb->usb_psy = usb_psy; if (i2c->irq < 0) { dev_err(&i2c->dev, "irq not defined (%d)\n", i2c->irq); ret = -EINVAL; goto out; } /* Update initial state to USB */ piusb_irq(i2c->irq, pi_usb); ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, piusb_irq, IRQF_ONESHOT | IRQF_TRIGGER_FALLING, PERICOM_I2C_NAME, pi_usb); if (ret) { dev_err(&i2c->dev, "irq(%d) req failed-%d\n", i2c->irq, ret); goto out; } dev_dbg(&i2c->dev, "%s finished, addr:%d\n", __func__, i2c->addr); return 0; out: return ret; } static int piusb_remove(struct i2c_client *i2c) { struct pi_usb_type_c *pi_usb = i2c_get_clientdata(i2c); devm_kfree(&i2c->dev, pi_usb); return 0; } static const struct i2c_device_id piusb_id[] = { { PERICOM_I2C_NAME, 0 }, { } }; MODULE_DEVICE_TABLE(i2c, piusb_id); #ifdef CONFIG_OF static const struct of_device_id piusb_of_match[] = { { .compatible = "pericom,usb-type-c", }, {}, }; MODULE_DEVICE_TABLE(of, piusb_of_match); #endif static struct i2c_driver piusb_driver = { .driver = { .name = PERICOM_I2C_NAME, .of_match_table = of_match_ptr(piusb_of_match), }, .probe = piusb_probe, .remove = piusb_remove, .id_table = piusb_id, }; module_i2c_driver(piusb_driver); MODULE_DESCRIPTION("Pericom TypeC Detection driver"); MODULE_LICENSE("GPL v2"); Loading
Documentation/devicetree/bindings/misc/usb-type-c.txt 0 → 100644 +27 −0 Original line number Diff line number Diff line USB Type-C Detection Chip Required properties : - compatible : Must be "pericom,usb-type-c" - reg: 7bit I2C slave address - interrupt-parent: Should be phandle for the interrupt controller that services interrupts for this device. - interrupt: IRQ line Optional properties: - pinctrl-names : This should be defined if a target uses pinctrl framework for INT_N pin. See "pinctrl" in Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt. It should specify the names of the configs that pinctrl can install in driver. Following are the pinctrl config that can be installed: "usbc_int_default" : Default configuration of INT_N pin. Example : pericom-type-c@3d { compatible = "pericom,usb-type-c"; reg = <0x3d>; interrupt-parent = <&msm_gpio>; interrupts = <102 0>; /* MSM GPIO 102 */ pinctrl-names = "default"; pinctrl-0 = <&usbc_int_default>; };
Documentation/devicetree/bindings/vendor-prefixes.txt +1 −0 Original line number Diff line number Diff line Loading @@ -127,6 +127,7 @@ onnn ON Semiconductor Corp. opencores OpenCores.org ovti OmniVision Technologies, Inc. panasonic Panasonic Corporation pericom Pericom Semiconductor Corp. phytec PHYTEC Messtechnik GmbH picochip Picochip Ltd plathome Plat'Home Co., Ltd. Loading
drivers/misc/Kconfig +10 −0 Original line number Diff line number Diff line Loading @@ -541,6 +541,16 @@ config UID_CPUTIME help Per UID based cpu time statistics exported to /proc/uid_cputime config USB_EXT_TYPE_C tristate "USB Type-C charger detection support using external chip" depends on I2C && POWER_SUPPLY help Enables support for the USB Type-C chargers using external chips connected using I2C. This adds support for detecting USB Type-C chargers that can supply upto 3A Vbus current for charging. config TI_DRV2667 tristate "TI's DRV2667 haptic controller support" depends on I2C Loading
drivers/misc/Makefile +1 −0 Original line number Diff line number Diff line Loading @@ -65,3 +65,4 @@ obj-$(CONFIG_CXL_BASE) += cxl/ obj-$(CONFIG_UID_CPUTIME) += uid_cputime.o obj-y += qcom/ obj-$(CONFIG_TI_DRV2667) += ti_drv2667.o obj-$(CONFIG_USB_EXT_TYPE_C) += type-c-pericom.o
drivers/misc/type-c-pericom.c 0 → 100644 +241 −0 Original line number Diff line number Diff line /* Copyright (c) 2015, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <linux/i2c.h> #include <linux/slab.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/interrupt.h> #include <linux/power_supply.h> #define PERICOM_I2C_NAME "usb-type-c-pericom" #define CCD_DEFAULT 0x1 #define CCD_MEDIUM 0x2 #define CCD_HIGH 0x3 #define MAX_CURRENT_BC1P2 500 #define MAX_CURRENT_MEDIUM 1500 #define MAX_CURRENT_HIGH 3000 struct piusb_regs { u8 dev_id; u8 control; u8 intr_status; #define INTS_ATTACH 0x1 #define INTS_DETACH 0x2 #define INTS_ATTACH_MASK 0x3 /* current attach state interrupt */ u8 port_status; #define STS_PORT_MASK (0x1c) /* attached port status - device/host */ #define STS_CCD_MASK (0x60) /* charging current status */ #define STS_VBUS_MASK (0x80) /* vbus status */ } __packed; struct pi_usb_type_c { struct i2c_client *client; struct piusb_regs reg_data; struct power_supply *usb_psy; int max_current; bool attach_state; }; static struct pi_usb_type_c *pi_usb; static int piusb_read_regdata(struct i2c_client *i2c) { int rc; int data_length = sizeof(pi_usb->reg_data); uint16_t saddr = i2c->addr; u8 attach_state; struct i2c_msg msgs[] = { { .addr = saddr, .flags = I2C_M_RD, .len = data_length, .buf = (u8 *)&pi_usb->reg_data, } }; rc = i2c_transfer(i2c->adapter, msgs, 1); if (rc < 0) { /* i2c read may fail if type-c plug removed, treat as detach */ dev_dbg(&i2c->dev, "i2c read from 0x%x failed %d\n", saddr, rc); pi_usb->attach_state = false; return 0; } dev_dbg(&i2c->dev, "i2c read from 0x%x-[%x %x %x %x]\n", saddr, pi_usb->reg_data.dev_id, pi_usb->reg_data.control, pi_usb->reg_data.intr_status, pi_usb->reg_data.port_status); if (!pi_usb->reg_data.intr_status) { dev_err(&i2c->dev, "intr_status is 0!, ignore interrupt\n"); pi_usb->attach_state = false; return -EINVAL; } attach_state = pi_usb->reg_data.intr_status & INTS_ATTACH_MASK; pi_usb->attach_state = (attach_state == INTS_ATTACH) ? true : false; return rc; } static int piusb_update_power_supply(struct power_supply *psy, int limit) { const union power_supply_propval ret = {limit,}; /* Update USB of max charging current (500 corresponds to bc1.2 */ if (psy->set_property) return psy->set_property(psy, POWER_SUPPLY_PROP_INPUT_CURRENT_MAX, &ret); return -ENODEV; } static void piusb_update_max_current(struct pi_usb_type_c *pi_usb) { u8 mask = STS_CCD_MASK; u8 shift = find_first_bit((void *)&mask, 8); u8 chg_mode = pi_usb->reg_data.port_status & mask; chg_mode >>= shift; /* update to 0 if type-c detached */ if (!pi_usb->attach_state) { pi_usb->max_current = 0; return; } switch (chg_mode) { case CCD_DEFAULT: pi_usb->max_current = MAX_CURRENT_BC1P2; break; case CCD_MEDIUM: pi_usb->max_current = MAX_CURRENT_MEDIUM; break; case CCD_HIGH: pi_usb->max_current = MAX_CURRENT_HIGH; break; default: dev_dbg(&pi_usb->client->dev, "wrong chg mode %x\n", chg_mode); pi_usb->max_current = MAX_CURRENT_BC1P2; } dev_dbg(&pi_usb->client->dev, "chg mode: %x, mA:%u\n", chg_mode, pi_usb->max_current); } static irqreturn_t piusb_irq(int irq, void *data) { int ret; struct pi_usb_type_c *pi_usb = (struct pi_usb_type_c *)data; /* i2c register update takes time, 30msec sleep required as per HPG */ msleep(30); ret = piusb_read_regdata(pi_usb->client); if (ret < 0) goto out; piusb_update_max_current(pi_usb); ret = piusb_update_power_supply(pi_usb->usb_psy, pi_usb->max_current); if (ret < 0) dev_err(&pi_usb->client->dev, "failed to notify USB-%d\n", ret); out: return IRQ_HANDLED; } static int piusb_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { int ret; struct power_supply *usb_psy; usb_psy = power_supply_get_by_name("usb"); if (!usb_psy) { dev_dbg(&i2c->dev, "USB power_supply not found, defer probe\n"); return -EPROBE_DEFER; } pi_usb = devm_kzalloc(&i2c->dev, sizeof(struct pi_usb_type_c), GFP_KERNEL); if (!pi_usb) return -ENOMEM; i2c_set_clientdata(i2c, pi_usb); pi_usb->client = i2c; pi_usb->usb_psy = usb_psy; if (i2c->irq < 0) { dev_err(&i2c->dev, "irq not defined (%d)\n", i2c->irq); ret = -EINVAL; goto out; } /* Update initial state to USB */ piusb_irq(i2c->irq, pi_usb); ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, piusb_irq, IRQF_ONESHOT | IRQF_TRIGGER_FALLING, PERICOM_I2C_NAME, pi_usb); if (ret) { dev_err(&i2c->dev, "irq(%d) req failed-%d\n", i2c->irq, ret); goto out; } dev_dbg(&i2c->dev, "%s finished, addr:%d\n", __func__, i2c->addr); return 0; out: return ret; } static int piusb_remove(struct i2c_client *i2c) { struct pi_usb_type_c *pi_usb = i2c_get_clientdata(i2c); devm_kfree(&i2c->dev, pi_usb); return 0; } static const struct i2c_device_id piusb_id[] = { { PERICOM_I2C_NAME, 0 }, { } }; MODULE_DEVICE_TABLE(i2c, piusb_id); #ifdef CONFIG_OF static const struct of_device_id piusb_of_match[] = { { .compatible = "pericom,usb-type-c", }, {}, }; MODULE_DEVICE_TABLE(of, piusb_of_match); #endif static struct i2c_driver piusb_driver = { .driver = { .name = PERICOM_I2C_NAME, .of_match_table = of_match_ptr(piusb_of_match), }, .probe = piusb_probe, .remove = piusb_remove, .id_table = piusb_id, }; module_i2c_driver(piusb_driver); MODULE_DESCRIPTION("Pericom TypeC Detection driver"); MODULE_LICENSE("GPL v2");
