diff options
Diffstat (limited to 'driver/usb_mux/virtual.c')
-rw-r--r-- | driver/usb_mux/virtual.c | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/driver/usb_mux/virtual.c b/driver/usb_mux/virtual.c deleted file mode 100644 index dbece4faf9..0000000000 --- a/driver/usb_mux/virtual.c +++ /dev/null @@ -1,125 +0,0 @@ -/* Copyright 2016 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - * - * Virtual USB mux driver for host-controlled USB muxes. - */ - -#include "common.h" -#include "console.h" -#include "host_command.h" -#include "task.h" -#include "timer.h" -#include "usb_mux.h" -#include "util.h" - -/* - * USB PD protocol configures the USB & DP mux state and USB PD policy - * configures the HPD mux state. Both states are independent of each other - * may differ when the PD role changes when in dock mode. - */ -#define USB_PD_MUX_HPD_STATE (USB_PD_MUX_HPD_LVL | USB_PD_MUX_HPD_IRQ) -#define USB_PD_MUX_USB_DP_STATE (USB_PD_MUX_USB_ENABLED | \ - USB_PD_MUX_DP_ENABLED | USB_PD_MUX_POLARITY_INVERTED | \ - USB_PD_MUX_SAFE_MODE | USB_PD_MUX_TBT_COMPAT_ENABLED | \ - USB_PD_MUX_USB4_ENABLED) - -static mux_state_t virtual_mux_state[CONFIG_USB_PD_PORT_MAX_COUNT]; - -static inline void virtual_mux_update_state(int port, mux_state_t mux_state, - bool *ack_required) -{ - mux_state_t previous_mux_state = virtual_mux_state[port]; - - virtual_mux_state[port] = mux_state; - - /* - * Initialize ack_required to false to start, and set on necessary - * conditions - */ - *ack_required = false; - - if (!IS_ENABLED(CONFIG_HOSTCMD_EVENTS)) - return; - - host_set_single_event(EC_HOST_EVENT_USB_MUX); - - if (!IS_ENABLED(CONFIG_USB_MUX_AP_ACK_REQUEST)) - return; - - /* - * EC waits for the ACK from kernel indicating that TCSS Mux - * configuration is completed. This mechanism is implemented for - * entering, exiting the safe mode and entering the disconnect mode - * This is needed to remove timing senstivity between BB retimer and - * TCSS Mux to allow better synchronization between them and thereby - * remain in the same state for achieving proper safe state - * terminations. - */ - - /* TODO(b/186777984): Wait for an ACK for all mux state change */ - - if ((!(previous_mux_state & USB_PD_MUX_SAFE_MODE) && - (mux_state & USB_PD_MUX_SAFE_MODE)) || - ((previous_mux_state & USB_PD_MUX_SAFE_MODE) && - !(mux_state & USB_PD_MUX_SAFE_MODE)) || - ((previous_mux_state != USB_PD_MUX_NONE) && - (mux_state == USB_PD_MUX_NONE))) - *ack_required = true; -} - -static int virtual_init(const struct usb_mux *me) -{ - return EC_SUCCESS; -} - -/* - * Set the state of our 'virtual' mux. The EC does not actually control this - * mux, so update the desired state, then notify the host of the update. - */ -static int virtual_set_mux(const struct usb_mux *me, mux_state_t mux_state, - bool *ack_required) -{ - int port = me->usb_port; - - /* Current USB & DP mux status + existing HPD related mux status */ - mux_state_t new_mux_state = (mux_state & ~USB_PD_MUX_HPD_STATE) | - (virtual_mux_state[port] & USB_PD_MUX_HPD_STATE); - - virtual_mux_update_state(port, new_mux_state, ack_required); - - return EC_SUCCESS; -} - -/* - * Get the state of our 'virtual' mux. Since we the EC does not actually - * control this mux, and the EC has no way of knowing its actual status, - * we return the desired state here. - */ -static int virtual_get_mux(const struct usb_mux *me, mux_state_t *mux_state) -{ - int port = me->usb_port; - - *mux_state = virtual_mux_state[port]; - - return EC_SUCCESS; -} - -void virtual_hpd_update(const struct usb_mux *me, mux_state_t mux_state) -{ - int port = me->usb_port; - bool unused; - - /* Current HPD related mux status + existing USB & DP mux status */ - mux_state_t new_mux_state = mux_state | - (virtual_mux_state[port] & USB_PD_MUX_USB_DP_STATE); - - /* HPD ACK isn't required for the EC to continue with its tasks */ - virtual_mux_update_state(port, new_mux_state, &unused); -} - -const struct usb_mux_driver virtual_usb_mux_driver = { - .init = virtual_init, - .set = virtual_set_mux, - .get = virtual_get_mux, -}; |