diff options
Diffstat (limited to 'driver/usb_mux/tusb1064.c')
| -rw-r--r-- | driver/usb_mux/tusb1064.c | 71 |
1 files changed, 49 insertions, 22 deletions
diff --git a/driver/usb_mux/tusb1064.c b/driver/usb_mux/tusb1064.c index c236e3d1ab..d0e8678039 100644 --- a/driver/usb_mux/tusb1064.c +++ b/driver/usb_mux/tusb1064.c @@ -14,12 +14,6 @@ #error "Must choose CONFIG_USB_MUX_TUSB1044 or CONFIG_USB_MUX_TUSB1064" #endif -/* - * configuration bits which never change in the General Register - * e.g. REG_GENERAL_DP_EN_CTRL or REG_GENERAL_EQ_OVERRIDE - */ -#define REG_GENERAL_STATIC_BITS REG_GENERAL_EQ_OVERRIDE - static int tusb1064_read(const struct usb_mux *me, uint8_t reg, uint8_t *val) { int buffer = 0xee; @@ -36,11 +30,15 @@ static int tusb1064_write(const struct usb_mux *me, uint8_t reg, uint8_t val) } #if defined(CONFIG_USB_MUX_TUSB1044) -void tusb1044_hpd_update(const struct usb_mux *me, mux_state_t mux_state) +void tusb1044_hpd_update(const struct usb_mux *me, mux_state_t mux_state, + bool *ack_required) { int res; uint8_t reg; + /* This driver does not use host command ACKs */ + *ack_required = false; + res = tusb1064_read(me, TUSB1064_REG_GENERAL, ®); if (res) return; @@ -60,11 +58,54 @@ void tusb1044_hpd_update(const struct usb_mux *me, mux_state_t mux_state) } #endif +int tusb1064_set_dp_rx_eq(const struct usb_mux *me, int db) +{ + uint8_t reg; + int rv; + + if (db < TUSB1064_DP_EQ_RX_NEG_0_3_DB || db > TUSB1064_DP_EQ_RX_12_1_DB) + return EC_ERROR_INVAL; + + /* Set the requested gain values */ + reg = TUSB1064_DP1EQ(db) | TUSB1064_DP3EQ(db); + rv = tusb1064_write(me, TUSB1064_REG_DP1DP3EQ_SEL, reg); + if (rv) + return rv; + + reg = TUSB1064_DP0EQ(db) | TUSB1064_DP2EQ(db); + rv = tusb1064_write(me, TUSB1064_REG_DP0DP2EQ_SEL, reg); + if (rv) + return rv; + + /* Enable EQ_OVERRIDE so the gain registers are used */ + rv = tusb1064_read(me, TUSB1064_REG_GENERAL, ®); + if (rv) + return rv; + + reg |= REG_GENERAL_EQ_OVERRIDE; + + return tusb1064_write(me, TUSB1064_REG_GENERAL, reg); +} + /* Writes control register to set switch mode */ static int tusb1064_set_mux(const struct usb_mux *me, mux_state_t mux_state, bool *ack_required) { - int reg = REG_GENERAL_STATIC_BITS; + uint8_t reg; + int rv; + int mask; + + rv = tusb1064_read(me, TUSB1064_REG_GENERAL, ®); + if (rv) + return rv; + + /* Mask bits that may be set in this function */ + mask = REG_GENERAL_CTLSEL_USB3 | REG_GENERAL_CTLSEL_ANYDP | + REG_GENERAL_FLIPSEL; +#ifdef CONFIG_USB_MUX_TUSB1044 + mask |= REG_GENERAL_HPDIN_OVERRIDE; +#endif + reg &= ~mask; /* This driver does not use host command ACKs */ *ack_required = false; @@ -112,22 +153,8 @@ static int tusb1064_get_mux(const struct usb_mux *me, mux_state_t *mux_state) static int tusb1064_init(const struct usb_mux *me) { int res; - uint8_t reg; bool unused; - /* Default to "Floating Pin" DP Equalization */ - reg = TUSB1064_DP1EQ(TUSB1064_DP_EQ_RX_10_0_DB) | - TUSB1064_DP3EQ(TUSB1064_DP_EQ_RX_10_0_DB); - res = tusb1064_write(me, TUSB1064_REG_DP1DP3EQ_SEL, reg); - if (res) - return res; - - reg = TUSB1064_DP0EQ(TUSB1064_DP_EQ_RX_10_0_DB) | - TUSB1064_DP2EQ(TUSB1064_DP_EQ_RX_10_0_DB); - res = tusb1064_write(me, TUSB1064_REG_DP0DP2EQ_SEL, reg); - if (res) - return res; - /* * Note that bypassing the usb_mux API is okay for internal driver calls * since the task calling init already holds this port's mux lock. |