diff options
| -rw-r--r-- | driver/usb_mux/it5205.c | 37 | ||||
| -rw-r--r-- | driver/usb_mux/it5205.h | 35 | ||||
| -rw-r--r-- | include/config.h | 3 |
3 files changed, 73 insertions, 2 deletions
diff --git a/driver/usb_mux/it5205.c b/driver/usb_mux/it5205.c index 95416547cd..f275568313 100644 --- a/driver/usb_mux/it5205.c +++ b/driver/usb_mux/it5205.c @@ -6,10 +6,8 @@ */ #include "common.h" -#include "console.h" #include "i2c.h" #include "it5205.h" -#include "usb_mux.h" #include "util.h" #define MUX_STATE_DP_USB_MASK (USB_PD_MUX_USB_ENABLED | USB_PD_MUX_DP_ENABLED) @@ -24,6 +22,20 @@ static int it5205_write(const struct usb_mux *me, uint8_t reg, uint8_t val) return i2c_write8(me->i2c_port, me->i2c_addr_flags, reg, val); } +static int it5205h_sbu_update(const struct usb_mux *me, uint8_t reg, + uint8_t mask, enum mask_update_action action) +{ + return i2c_update8(me->i2c_port, IT5205H_SBU_I2C_ADDR_FLAGS, + reg, mask, action); +} + +static int it5205h_sbu_field_update(const struct usb_mux *me, uint8_t reg, + uint8_t field_mask, uint8_t set_value) +{ + return i2c_field_update8(me->i2c_port, IT5205H_SBU_I2C_ADDR_FLAGS, + reg, field_mask, set_value); +} + struct mux_chip_id_t { uint8_t chip_id; uint8_t reg; @@ -54,9 +66,30 @@ static int it5205_init(const struct usb_mux *me) return EC_ERROR_UNKNOWN; } + if (IS_ENABLED(CONFIG_USB_MUX_IT5205H_SBU_OVP)) { + RETURN_ERROR(it5205h_sbu_field_update(me, IT5205H_REG_VSR, + IT5205H_VREF_SELECT_MASK, + IT5205H_VREF_SELECT_3_3V)); + + RETURN_ERROR(it5205h_sbu_field_update(me, IT5205H_REG_CSBUOVPSR, + IT5205H_OVP_SELECT_MASK, + IT5205H_OVP_3_68V)); + + RETURN_ERROR(it5205h_sbu_update(me, IT5205H_REG_ISR, + IT5205H_ISR_CSBU_MASK, MASK_CLR)); + + RETURN_ERROR(it5205h_enable_csbu_switch(me, true)); + } + return EC_SUCCESS; } +enum ec_error_list it5205h_enable_csbu_switch(const struct usb_mux *me, bool en) +{ + return it5205h_sbu_update(me, IT5205H_REG_CSBUSR, + IT5205H_CSBUSR_SWITCH, en ? MASK_SET : MASK_CLR); +} + /* Writes control register to set switch mode */ static int it5205_set_mux(const struct usb_mux *me, mux_state_t mux_state) { diff --git a/driver/usb_mux/it5205.h b/driver/usb_mux/it5205.h index 9e9c4ccfcc..c4fdc6ce49 100644 --- a/driver/usb_mux/it5205.h +++ b/driver/usb_mux/it5205.h @@ -8,6 +8,9 @@ #ifndef __CROS_EC_IT5205_H #define __CROS_EC_IT5205_H +#include "stdbool.h" +#include "usb_mux.h" + /* I2C interface */ #define IT5205_I2C_ADDR1_FLAGS 0x48 #define IT5205_I2C_ADDR2_FLAGS 0x58 @@ -31,4 +34,36 @@ #define IT5205_DP_USB 0x03 #define IT5205_USB 0x07 + +/* IT5205-H SBU module */ + +/* I2C address for SBU switch control */ +#define IT5205H_SBU_I2C_ADDR_FLAGS 0x6a + +/* Vref Select Register */ +#define IT5205H_REG_VSR 0x10 +#define IT5205H_VREF_SELECT_MASK 0x30 +#define IT5205H_VREF_SELECT_3_3V 0x00 +#define IT5205H_VREF_SELECT_OFF 0x20 + +/* CSBU OVP Select Register */ +#define IT5205H_REG_CSBUOVPSR 0x1e +#define IT5205H_OVP_SELECT_MASK 0x30 +#define IT5205H_OVP_3_90V 0x00 +#define IT5205H_OVP_3_68V 0x10 +#define IT5205H_OVP_3_62V 0x20 +#define IT5205H_OVP_3_57V 0x30 + +/* CSBU Switch Register */ +#define IT5205H_REG_CSBUSR 0x22 +#define IT5205H_CSBUSR_SWITCH BIT(0) + +/* Interrupt Switch Register */ +#define IT5205H_REG_ISR 0x25 +#define IT5205H_ISR_CSBU_MASK BIT(4) +#define IT5205H_ISR_CSBU_OVP BIT(0) + +enum ec_error_list it5205h_enable_csbu_switch(const struct usb_mux *me, + bool en); + #endif /* __CROS_EC_IT5205_H */ diff --git a/include/config.h b/include/config.h index db68f2f8e7..3a6251422d 100644 --- a/include/config.h +++ b/include/config.h @@ -4538,6 +4538,9 @@ /* 'Virtual' USB mux under host (not EC) control */ #undef CONFIG_USB_MUX_VIRTUAL +/* Enable IT5205H SBU protection switch */ +#undef CONFIG_USB_MUX_IT5205H_SBU_OVP + /*****************************************************************************/ /* USB GPIO config */ #undef CONFIG_USB_GPIO |