diff options
Diffstat (limited to 'zephyr/projects/skyrim/src/morthal/usb_mux_config.c')
| -rw-r--r-- | zephyr/projects/skyrim/src/morthal/usb_mux_config.c | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/zephyr/projects/skyrim/src/morthal/usb_mux_config.c b/zephyr/projects/skyrim/src/morthal/usb_mux_config.c new file mode 100644 index 0000000000..8fe76233e2 --- /dev/null +++ b/zephyr/projects/skyrim/src/morthal/usb_mux_config.c @@ -0,0 +1,142 @@ +/* Copyright 2022 The ChromiumOS Authors + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +/* Morthal board-specific USB-C mux configuration */ + +#include <zephyr/drivers/gpio.h> + +#include "console.h" +#include "cros_board_info.h" +#include "cros_cbi.h" +#include "driver/retimer/anx7483_public.h" +#include "hooks.h" +#include "ioexpander.h" +#include "usb_mux.h" +#include "usbc/usb_muxes.h" + +#define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ##args) +#define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ##args) + +/* + * USB C0 (general) and C1 (just ANX DB) use IOEX pins to + * indicate flipped polarity to a protection switch. + */ +static int ioex_set_flip(int port, mux_state_t mux_state) +{ + if (port == 0) { + if (mux_state & USB_PD_MUX_POLARITY_INVERTED) + gpio_pin_set_dt( + GPIO_DT_FROM_NODELABEL(ioex_usb_c0_sbu_flip), + 1); + else + gpio_pin_set_dt( + GPIO_DT_FROM_NODELABEL(ioex_usb_c0_sbu_flip), + 0); + } else { + if (mux_state & USB_PD_MUX_POLARITY_INVERTED) + gpio_pin_set_dt( + GPIO_DT_FROM_NODELABEL(ioex_usb_c1_sbu_flip), + 1); + else + gpio_pin_set_dt( + GPIO_DT_FROM_NODELABEL(ioex_usb_c1_sbu_flip), + 0); + } + + return EC_SUCCESS; +} + +int board_anx7483_c0_mux_set(const struct usb_mux *me, mux_state_t mux_state) +{ + /* Set the SBU polarity mux */ + RETURN_ERROR(ioex_set_flip(me->usb_port, mux_state)); + + return anx7483_set_default_tuning(me, mux_state); +} + +int board_anx7483_c1_mux_set(const struct usb_mux *me, mux_state_t mux_state) +{ + bool flipped = mux_state & USB_PD_MUX_POLARITY_INVERTED; + + /* Set the SBU polarity mux */ + RETURN_ERROR(ioex_set_flip(me->usb_port, mux_state)); + + /* Remove flipped from the state for easier compraisons */ + mux_state = mux_state & ~USB_PD_MUX_POLARITY_INVERTED; + + RETURN_ERROR(anx7483_set_default_tuning(me, mux_state)); + + if (mux_state == USB_PD_MUX_USB_ENABLED) { + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX2, + ANX7483_EQ_SETTING_12_5DB)); + } else if (mux_state == USB_PD_MUX_DP_ENABLED) { + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX2, + ANX7483_EQ_SETTING_12_5DB)); + } else if (mux_state == USB_PD_MUX_DOCK && !flipped) { + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX2, + ANX7483_EQ_SETTING_12_5DB)); + } else if (mux_state == USB_PD_MUX_DOCK && flipped) { + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_URX2, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_UTX1, + ANX7483_EQ_SETTING_12_5DB)); + RETURN_ERROR(anx7483_set_eq(me, ANX7483_PIN_DRX2, + ANX7483_EQ_SETTING_12_5DB)); + } + + return EC_SUCCESS; +} + +int board_c1_ps8818_mux_set(const struct usb_mux *me, mux_state_t mux_state) +{ + CPRINTSUSB("C1: PS8818 mux using default tuning"); + + /* Once a DP connection is established, we need to set IN_HPD */ + if (mux_state & USB_PD_MUX_DP_ENABLED) + ioex_set_level(IOEX_USB_C1_HPD_IN_DB, 1); + else + ioex_set_level(IOEX_USB_C1_HPD_IN_DB, 0); + + return 0; +} + +static void setup_mux(void) +{ + uint32_t val; + + if (cros_cbi_get_fw_config(FW_IO_DB, &val) != 0) + CPRINTSUSB("Error finding FW_DB_IO in CBI FW_CONFIG"); + /* Val will have our dts default on error, so continue setup */ + + if (val == FW_IO_DB_PS8811_PS8818) { + CPRINTSUSB("C1: Setting PS8818 mux"); + USB_MUX_ENABLE_ALTERNATIVE(usb_mux_chain_ps8818_port1); + } else if (val == FW_IO_DB_NONE_ANX7483) { + CPRINTSUSB("C1: Setting ANX7483 mux"); + } else { + CPRINTSUSB("Unexpected DB_IO board: %d", val); + } +} +DECLARE_HOOK(HOOK_INIT, setup_mux, HOOK_PRIO_INIT_I2C); |