// SPDX-License-Identifier: GPL-2.0-or-later/* * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches * * Copyright (c) 2014 Samsung Electronics Co., Ltd * Author: Chanwoo Choi <cw00.choi@samsung.com> */ #include <linux/err.h>#include <linux/i2c.h>#include <linux/input.h>#include <linux/interrupt.h>#include <linux/irqdomain.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/platform_device.h>#include <linux/regmap.h>#include <linux/slab.h>#include <linux/extcon-provider.h> #include "extcon-rt8973a.h" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ struct muic_irq { unsigned int irq; const char *name; unsigned int virq;}; struct reg_data { u8 reg; u8 mask; u8 val; bool invert;}; struct rt8973a_muic_info { struct device *dev; struct extcon_dev *edev; struct i2c_client *i2c; struct regmap *regmap; struct regmap_irq_chip_data *irq_data; struct muic_irq *muic_irqs; unsigned int num_muic_irqs; int irq; bool irq_attach; bool irq_detach; bool irq_ovp; bool irq_otp; struct work_struct irq_work; struct reg_data *reg_data; unsigned int num_reg_data; bool auto_config; struct mutex mutex; /* * Use delayed workqueue to detect cable state and then * notify cable state to notifiee/platform through uevent. * After completing the booting of platform, the extcon provider * driver should notify cable state to upper layer. */ struct delayed_work wq_detcable;}; /* Default value of RT8973A register to bring up MUIC device. */static struct reg_data rt8973a_reg_data[] = { { .reg = RT8973A_REG_CONTROL1, .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | RT8973A_REG_CONTROL1_CHGTYP_MASK | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK | RT8973A_REG_CONTROL1_INTM_MASK, .val = RT8973A_REG_CONTROL1_ADC_EN_MASK | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | RT8973A_REG_CONTROL1_CHGTYP_MASK, .invert = false, }, { /* sentinel */ }}; /* List of detectable cables */static const unsigned int rt8973a_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_JIG, EXTCON_NONE,}; /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */enum rt8973a_event_type { RT8973A_EVENT_ATTACH = 1, RT8973A_EVENT_DETACH, RT8973A_EVENT_OVP, RT8973A_EVENT_OTP,}; /* Define supported accessory type */enum rt8973a_muic_acc_type { RT8973A_MUIC_ADC_OTG = 0x0, RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, RT8973A_MUIC_ADC_RESERVED_ACC_1, RT8973A_MUIC_ADC_RESERVED_ACC_2, RT8973A_MUIC_ADC_RESERVED_ACC_3, RT8973A_MUIC_ADC_RESERVED_ACC_4, RT8973A_MUIC_ADC_RESERVED_ACC_5, RT8973A_MUIC_ADC_AUDIO_TYPE2, RT8973A_MUIC_ADC_PHONE_POWERED_DEV, RT8973A_MUIC_ADC_UNKNOWN_ACC_1, RT8973A_MUIC_ADC_UNKNOWN_ACC_2, RT8973A_MUIC_ADC_TA, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, RT8973A_MUIC_ADC_UNKNOWN_ACC_3, RT8973A_MUIC_ADC_UNKNOWN_ACC_4, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, RT8973A_MUIC_ADC_UNKNOWN_ACC_5, RT8973A_MUIC_ADC_OPEN = 0x1f, /* * The below accessories has same ADC value (0x1f). * So, Device type1 is used to separate specific accessory. */ /* |---------|--ADC| */ /* | [7:5]|[4:0]| */ RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */}; /* List of supported interrupt for RT8973A */static struct muic_irq rt8973a_muic_irqs[] = { { RT8973A_INT1_ATTACH, "muic-attach" }, { RT8973A_INT1_DETACH, "muic-detach" }, { RT8973A_INT1_CHGDET, "muic-chgdet" }, { RT8973A_INT1_DCD_T, "muic-dcd-t" }, { RT8973A_INT1_OVP, "muic-ovp" }, { RT8973A_INT1_CONNECT, "muic-connect" }, { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, { RT8973A_INT1_OTP, "muic-otp" }, { RT8973A_INT2_UVLO, "muic-uvlo" }, { RT8973A_INT2_POR, "muic-por" }, { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, { RT8973A_INT2_OCP, "muic-ocp" }, { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" },}; /* Define interrupt list of RT8973A to register regmap_irq */static const struct regmap_irq rt8973a_irqs[] = { /* INT1 interrupts */ { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, /* INT2 interrupts */ { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, },}; static const struct regmap_irq_chip rt8973a_muic_irq_chip = { .name = "rt8973a", .status_base = RT8973A_REG_INT1, .mask_base = RT8973A_REG_INTM1, .num_regs = 2, .irqs = rt8973a_irqs, .num_irqs = ARRAY_SIZE(rt8973a_irqs),}; /* Define regmap configuration of RT8973A for I2C communication */static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg){ switch (reg) { case RT8973A_REG_INTM1: case RT8973A_REG_INTM2: return true; default: break; } return false;} static const struct regmap_config rt8973a_muic_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_reg = rt8973a_muic_volatile_reg, .max_register = RT8973A_REG_END,}; /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, unsigned int con_sw, bool attached){ int ret; /* * Don't need to set h/w path according to cable type * if Auto-configuration mode of CONTROL1 register is true. */ if (info->auto_config) return 0; if (!attached) con_sw = DM_DP_SWITCH_UART; switch (con_sw) { case DM_DP_SWITCH_OPEN: case DM_DP_SWITCH_USB: case DM_DP_SWITCH_UART: ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, RT8973A_REG_MANUAL_SW1_DP_MASK | RT8973A_REG_MANUAL_SW1_DM_MASK, con_sw); if (ret < 0) { dev_err(info->dev, "cannot update DM_CON/DP_CON switch\n"); return ret; } break; default: dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", con_sw); return -EINVAL; } return 0;} static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info){ unsigned int adc, dev1; int ret, cable_type; /* Read ADC value according to external cable or button */ ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); if (ret) { dev_err(info->dev, "failed to read ADC register\n"); return ret; } cable_type = adc & RT8973A_REG_ADC_MASK; /* Read Device 1 reigster to identify correct cable type */ ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); if (ret) { dev_err(info->dev, "failed to read DEV1 register\n"); return ret; } switch (adc) { case RT8973A_MUIC_ADC_OPEN: if (dev1 & RT8973A_REG_DEV1_USB_MASK) cable_type = RT8973A_MUIC_ADC_USB; else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) cable_type = RT8973A_MUIC_ADC_TA; else cable_type = RT8973A_MUIC_ADC_OPEN; break; default: break; } return cable_type;} static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, enum rt8973a_event_type event){ static unsigned int prev_cable_type; unsigned int con_sw = DM_DP_SWITCH_UART; int ret, cable_type; unsigned int id; bool attached = false; switch (event) { case RT8973A_EVENT_ATTACH: cable_type = rt8973a_muic_get_cable_type(info); attached = true; break; case RT8973A_EVENT_DETACH: cable_type = prev_cable_type; attached = false; break; case RT8973A_EVENT_OVP: case RT8973A_EVENT_OTP: dev_warn(info->dev, "happen Over %s issue. Need to disconnect all cables\n", event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); cable_type = prev_cable_type; attached = false; break; default: dev_err(info->dev, "Cannot handle this event (event:%d)\n", event); return -EINVAL; } prev_cable_type = cable_type; switch (cable_type) { case RT8973A_MUIC_ADC_OTG: id = EXTCON_USB_HOST; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_TA: id = EXTCON_CHG_USB_DCP; con_sw = DM_DP_SWITCH_OPEN; break; case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: id = EXTCON_JIG; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: id = EXTCON_JIG; con_sw = DM_DP_SWITCH_UART; break; case RT8973A_MUIC_ADC_USB: id = EXTCON_USB; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_OPEN: return 0; case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: dev_warn(info->dev, "Unknown accessory type (adc:0x%x)\n", cable_type); return 0; case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: case RT8973A_MUIC_ADC_AUDIO_TYPE2: dev_warn(info->dev, "Audio device/button type (adc:0x%x)\n", cable_type); return 0; case RT8973A_MUIC_ADC_RESERVED_ACC_1: case RT8973A_MUIC_ADC_RESERVED_ACC_2: case RT8973A_MUIC_ADC_RESERVED_ACC_3: case RT8973A_MUIC_ADC_RESERVED_ACC_4: case RT8973A_MUIC_ADC_RESERVED_ACC_5: case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: return 0; default: dev_err(info->dev, "Cannot handle this cable_type (adc:0x%x)\n", cable_type); return -EINVAL; } /* Change internal hardware path(DM_CON/DP_CON) */ ret = rt8973a_muic_set_path(info, con_sw, attached); if (ret < 0) return ret; /* Change the state of external accessory */ extcon_set_state_sync(info->edev, id, attached); if (id == EXTCON_USB) extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, attached); return 0;} static void rt8973a_muic_irq_work(struct work_struct *work){ struct rt8973a_muic_info *info = container_of(work, struct rt8973a_muic_info, irq_work); int ret = 0; if (!info->edev) return; mutex_lock(&info->mutex); /* Detect attached or detached cables */ if (info->irq_attach) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); info->irq_attach = false; } if (info->irq_detach) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); info->irq_detach = false; } if (info->irq_ovp) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); info->irq_ovp = false; } if (info->irq_otp) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); info->irq_otp = false; } if (ret < 0) dev_err(info->dev, "failed to handle MUIC interrupt\n"); mutex_unlock(&info->mutex);} static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data){ struct rt8973a_muic_info *info = data; int i, irq_type = -1; for (i = 0; i < info->num_muic_irqs; i++) if (irq == info->muic_irqs[i].virq) irq_type = info->muic_irqs[i].irq; switch (irq_type) { case RT8973A_INT1_ATTACH: info->irq_attach = true; break; case RT8973A_INT1_DETACH: info->irq_detach = true; break; case RT8973A_INT1_OVP: info->irq_ovp = true; break; case RT8973A_INT1_OTP: info->irq_otp = true; break; case RT8973A_INT1_CHGDET: case RT8973A_INT1_DCD_T: case RT8973A_INT1_CONNECT: case RT8973A_INT1_ADC_CHG: case RT8973A_INT2_UVLO: case RT8973A_INT2_POR: case RT8973A_INT2_OTP_FET: case RT8973A_INT2_OVP_FET: case RT8973A_INT2_OCP_LATCH: case RT8973A_INT2_OCP: case RT8973A_INT2_OVP_OCP: default: dev_dbg(info->dev, "Cannot handle this interrupt (%d)\n", irq_type); break; } schedule_work(&info->irq_work); return IRQ_HANDLED;} static void rt8973a_muic_detect_cable_wq(struct work_struct *work){ struct rt8973a_muic_info *info = container_of(to_delayed_work(work), struct rt8973a_muic_info, wq_detcable); int ret; /* Notify the state of connector cable or not */ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); if (ret < 0) dev_warn(info->dev, "failed to detect cable state\n");} static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)Lines 1–500 of 711. 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// SPDX-License-Identifier: GPL-2.0-or-later /* * extcon-rt8973a.c - Richtek RT8973A extcon driver to support USB switches * * Copyright (c) 2014 Samsung Electronics Co., Ltd * Author: Chanwoo Choi <cw00.choi@samsung.com> */ #include <linux/err.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/regmap.h> #include <linux/slab.h> #include <linux/extcon-provider.h> #include "extcon-rt8973a.h" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ struct muic_irq { unsigned int irq; const char *name; unsigned int virq; }; struct reg_data { u8 reg; u8 mask; u8 val; bool invert; }; struct rt8973a_muic_info { struct device *dev; struct extcon_dev *edev; struct i2c_client *i2c; struct regmap *regmap; struct regmap_irq_chip_data *irq_data; struct muic_irq *muic_irqs; unsigned int num_muic_irqs; int irq; bool irq_attach; bool irq_detach; bool irq_ovp; bool irq_otp; struct work_struct irq_work; struct reg_data *reg_data; unsigned int num_reg_data; bool auto_config; struct mutex mutex; /* * Use delayed workqueue to detect cable state and then * notify cable state to notifiee/platform through uevent. * After completing the booting of platform, the extcon provider * driver should notify cable state to upper layer. */ struct delayed_work wq_detcable; }; /* Default value of RT8973A register to bring up MUIC device. */ static struct reg_data rt8973a_reg_data[] = { { .reg = RT8973A_REG_CONTROL1, .mask = RT8973A_REG_CONTROL1_ADC_EN_MASK | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | RT8973A_REG_CONTROL1_CHGTYP_MASK | RT8973A_REG_CONTROL1_SWITCH_OPEN_MASK | RT8973A_REG_CONTROL1_AUTO_CONFIG_MASK | RT8973A_REG_CONTROL1_INTM_MASK, .val = RT8973A_REG_CONTROL1_ADC_EN_MASK | RT8973A_REG_CONTROL1_USB_CHD_EN_MASK | RT8973A_REG_CONTROL1_CHGTYP_MASK, .invert = false, }, { /* sentinel */ } }; /* List of detectable cables */ static const unsigned int rt8973a_extcon_cable[] = { EXTCON_USB, EXTCON_USB_HOST, EXTCON_CHG_USB_SDP, EXTCON_CHG_USB_DCP, EXTCON_JIG, EXTCON_NONE, }; /* Define OVP (Over Voltage Protection), OTP (Over Temperature Protection) */ enum rt8973a_event_type { RT8973A_EVENT_ATTACH = 1, RT8973A_EVENT_DETACH, RT8973A_EVENT_OVP, RT8973A_EVENT_OTP, }; /* Define supported accessory type */ enum rt8973a_muic_acc_type { RT8973A_MUIC_ADC_OTG = 0x0, RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON, RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON, RT8973A_MUIC_ADC_RESERVED_ACC_1, RT8973A_MUIC_ADC_RESERVED_ACC_2, RT8973A_MUIC_ADC_RESERVED_ACC_3, RT8973A_MUIC_ADC_RESERVED_ACC_4, RT8973A_MUIC_ADC_RESERVED_ACC_5, RT8973A_MUIC_ADC_AUDIO_TYPE2, RT8973A_MUIC_ADC_PHONE_POWERED_DEV, RT8973A_MUIC_ADC_UNKNOWN_ACC_1, RT8973A_MUIC_ADC_UNKNOWN_ACC_2, RT8973A_MUIC_ADC_TA, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB, RT8973A_MUIC_ADC_UNKNOWN_ACC_3, RT8973A_MUIC_ADC_UNKNOWN_ACC_4, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART, RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART, RT8973A_MUIC_ADC_UNKNOWN_ACC_5, RT8973A_MUIC_ADC_OPEN = 0x1f, /* * The below accessories has same ADC value (0x1f). * So, Device type1 is used to separate specific accessory. */ /* |---------|--ADC| */ /* | [7:5]|[4:0]| */ RT8973A_MUIC_ADC_USB = 0x3f, /* | 001|11111| */ }; /* List of supported interrupt for RT8973A */ static struct muic_irq rt8973a_muic_irqs[] = { { RT8973A_INT1_ATTACH, "muic-attach" }, { RT8973A_INT1_DETACH, "muic-detach" }, { RT8973A_INT1_CHGDET, "muic-chgdet" }, { RT8973A_INT1_DCD_T, "muic-dcd-t" }, { RT8973A_INT1_OVP, "muic-ovp" }, { RT8973A_INT1_CONNECT, "muic-connect" }, { RT8973A_INT1_ADC_CHG, "muic-adc-chg" }, { RT8973A_INT1_OTP, "muic-otp" }, { RT8973A_INT2_UVLO, "muic-uvlo" }, { RT8973A_INT2_POR, "muic-por" }, { RT8973A_INT2_OTP_FET, "muic-otp-fet" }, { RT8973A_INT2_OVP_FET, "muic-ovp-fet" }, { RT8973A_INT2_OCP_LATCH, "muic-ocp-latch" }, { RT8973A_INT2_OCP, "muic-ocp" }, { RT8973A_INT2_OVP_OCP, "muic-ovp-ocp" }, }; /* Define interrupt list of RT8973A to register regmap_irq */ static const struct regmap_irq rt8973a_irqs[] = { /* INT1 interrupts */ { .reg_offset = 0, .mask = RT8973A_INT1_ATTACH_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_DETACH_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_CHGDET_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_DCD_T_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_OVP_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_CONNECT_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_ADC_CHG_MASK, }, { .reg_offset = 0, .mask = RT8973A_INT1_OTP_MASK, }, /* INT2 interrupts */ { .reg_offset = 1, .mask = RT8973A_INT2_UVLOT_MASK,}, { .reg_offset = 1, .mask = RT8973A_INT2_POR_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OTP_FET_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OVP_FET_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OCP_LATCH_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OCP_MASK, }, { .reg_offset = 1, .mask = RT8973A_INT2_OVP_OCP_MASK, }, }; static const struct regmap_irq_chip rt8973a_muic_irq_chip = { .name = "rt8973a", .status_base = RT8973A_REG_INT1, .mask_base = RT8973A_REG_INTM1, .num_regs = 2, .irqs = rt8973a_irqs, .num_irqs = ARRAY_SIZE(rt8973a_irqs), }; /* Define regmap configuration of RT8973A for I2C communication */ static bool rt8973a_muic_volatile_reg(struct device *dev, unsigned int reg) { switch (reg) { case RT8973A_REG_INTM1: case RT8973A_REG_INTM2: return true; default: break; } return false; } static const struct regmap_config rt8973a_muic_regmap_config = { .reg_bits = 8, .val_bits = 8, .volatile_reg = rt8973a_muic_volatile_reg, .max_register = RT8973A_REG_END, }; /* Change DM_CON/DP_CON/VBUSIN switch according to cable type */ static int rt8973a_muic_set_path(struct rt8973a_muic_info *info, unsigned int con_sw, bool attached) { int ret; /* * Don't need to set h/w path according to cable type * if Auto-configuration mode of CONTROL1 register is true. */ if (info->auto_config) return 0; if (!attached) con_sw = DM_DP_SWITCH_UART; switch (con_sw) { case DM_DP_SWITCH_OPEN: case DM_DP_SWITCH_USB: case DM_DP_SWITCH_UART: ret = regmap_update_bits(info->regmap, RT8973A_REG_MANUAL_SW1, RT8973A_REG_MANUAL_SW1_DP_MASK | RT8973A_REG_MANUAL_SW1_DM_MASK, con_sw); if (ret < 0) { dev_err(info->dev, "cannot update DM_CON/DP_CON switch\n"); return ret; } break; default: dev_err(info->dev, "Unknown DM_CON/DP_CON switch type (%d)\n", con_sw); return -EINVAL; } return 0; } static int rt8973a_muic_get_cable_type(struct rt8973a_muic_info *info) { unsigned int adc, dev1; int ret, cable_type; /* Read ADC value according to external cable or button */ ret = regmap_read(info->regmap, RT8973A_REG_ADC, &adc); if (ret) { dev_err(info->dev, "failed to read ADC register\n"); return ret; } cable_type = adc & RT8973A_REG_ADC_MASK; /* Read Device 1 reigster to identify correct cable type */ ret = regmap_read(info->regmap, RT8973A_REG_DEV1, &dev1); if (ret) { dev_err(info->dev, "failed to read DEV1 register\n"); return ret; } switch (adc) { case RT8973A_MUIC_ADC_OPEN: if (dev1 & RT8973A_REG_DEV1_USB_MASK) cable_type = RT8973A_MUIC_ADC_USB; else if (dev1 & RT8973A_REG_DEV1_DCPORT_MASK) cable_type = RT8973A_MUIC_ADC_TA; else cable_type = RT8973A_MUIC_ADC_OPEN; break; default: break; } return cable_type; } static int rt8973a_muic_cable_handler(struct rt8973a_muic_info *info, enum rt8973a_event_type event) { static unsigned int prev_cable_type; unsigned int con_sw = DM_DP_SWITCH_UART; int ret, cable_type; unsigned int id; bool attached = false; switch (event) { case RT8973A_EVENT_ATTACH: cable_type = rt8973a_muic_get_cable_type(info); attached = true; break; case RT8973A_EVENT_DETACH: cable_type = prev_cable_type; attached = false; break; case RT8973A_EVENT_OVP: case RT8973A_EVENT_OTP: dev_warn(info->dev, "happen Over %s issue. Need to disconnect all cables\n", event == RT8973A_EVENT_OVP ? "Voltage" : "Temperature"); cable_type = prev_cable_type; attached = false; break; default: dev_err(info->dev, "Cannot handle this event (event:%d)\n", event); return -EINVAL; } prev_cable_type = cable_type; switch (cable_type) { case RT8973A_MUIC_ADC_OTG: id = EXTCON_USB_HOST; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_TA: id = EXTCON_CHG_USB_DCP; con_sw = DM_DP_SWITCH_OPEN; break; case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_USB: case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_USB: id = EXTCON_JIG; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_OFF_UART: case RT8973A_MUIC_ADC_FACTORY_MODE_BOOT_ON_UART: id = EXTCON_JIG; con_sw = DM_DP_SWITCH_UART; break; case RT8973A_MUIC_ADC_USB: id = EXTCON_USB; con_sw = DM_DP_SWITCH_USB; break; case RT8973A_MUIC_ADC_OPEN: return 0; case RT8973A_MUIC_ADC_UNKNOWN_ACC_1: case RT8973A_MUIC_ADC_UNKNOWN_ACC_2: case RT8973A_MUIC_ADC_UNKNOWN_ACC_3: case RT8973A_MUIC_ADC_UNKNOWN_ACC_4: case RT8973A_MUIC_ADC_UNKNOWN_ACC_5: dev_warn(info->dev, "Unknown accessory type (adc:0x%x)\n", cable_type); return 0; case RT8973A_MUIC_ADC_AUDIO_SEND_END_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S1_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S2_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S3_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S4_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S5_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S6_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S7_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S8_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S9_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S10_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S11_BUTTON: case RT8973A_MUIC_ADC_AUDIO_REMOTE_S12_BUTTON: case RT8973A_MUIC_ADC_AUDIO_TYPE2: dev_warn(info->dev, "Audio device/button type (adc:0x%x)\n", cable_type); return 0; case RT8973A_MUIC_ADC_RESERVED_ACC_1: case RT8973A_MUIC_ADC_RESERVED_ACC_2: case RT8973A_MUIC_ADC_RESERVED_ACC_3: case RT8973A_MUIC_ADC_RESERVED_ACC_4: case RT8973A_MUIC_ADC_RESERVED_ACC_5: case RT8973A_MUIC_ADC_PHONE_POWERED_DEV: return 0; default: dev_err(info->dev, "Cannot handle this cable_type (adc:0x%x)\n", cable_type); return -EINVAL; } /* Change internal hardware path(DM_CON/DP_CON) */ ret = rt8973a_muic_set_path(info, con_sw, attached); if (ret < 0) return ret; /* Change the state of external accessory */ extcon_set_state_sync(info->edev, id, attached); if (id == EXTCON_USB) extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, attached); return 0; } static void rt8973a_muic_irq_work(struct work_struct *work) { struct rt8973a_muic_info *info = container_of(work, struct rt8973a_muic_info, irq_work); int ret = 0; if (!info->edev) return; mutex_lock(&info->mutex); /* Detect attached or detached cables */ if (info->irq_attach) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); info->irq_attach = false; } if (info->irq_detach) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_DETACH); info->irq_detach = false; } if (info->irq_ovp) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OVP); info->irq_ovp = false; } if (info->irq_otp) { ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_OTP); info->irq_otp = false; } if (ret < 0) dev_err(info->dev, "failed to handle MUIC interrupt\n"); mutex_unlock(&info->mutex); } static irqreturn_t rt8973a_muic_irq_handler(int irq, void *data) { struct rt8973a_muic_info *info = data; int i, irq_type = -1; for (i = 0; i < info->num_muic_irqs; i++) if (irq == info->muic_irqs[i].virq) irq_type = info->muic_irqs[i].irq; switch (irq_type) { case RT8973A_INT1_ATTACH: info->irq_attach = true; break; case RT8973A_INT1_DETACH: info->irq_detach = true; break; case RT8973A_INT1_OVP: info->irq_ovp = true; break; case RT8973A_INT1_OTP: info->irq_otp = true; break; case RT8973A_INT1_CHGDET: case RT8973A_INT1_DCD_T: case RT8973A_INT1_CONNECT: case RT8973A_INT1_ADC_CHG: case RT8973A_INT2_UVLO: case RT8973A_INT2_POR: case RT8973A_INT2_OTP_FET: case RT8973A_INT2_OVP_FET: case RT8973A_INT2_OCP_LATCH: case RT8973A_INT2_OCP: case RT8973A_INT2_OVP_OCP: default: dev_dbg(info->dev, "Cannot handle this interrupt (%d)\n", irq_type); break; } schedule_work(&info->irq_work); return IRQ_HANDLED; } static void rt8973a_muic_detect_cable_wq(struct work_struct *work) { struct rt8973a_muic_info *info = container_of(to_delayed_work(work), struct rt8973a_muic_info, wq_detcable); int ret; /* Notify the state of connector cable or not */ ret = rt8973a_muic_cable_handler(info, RT8973A_EVENT_ATTACH); if (ret < 0) dev_warn(info->dev, "failed to detect cable state\n"); } static void rt8973a_init_dev_type(struct rt8973a_muic_info *info)