/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */ /**************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** USBX Component */ /** */ /** EHCI Controller Driver */ /** */ /**************************************************************************/ /**************************************************************************/ /* Include necessary system files. */ #define UX_SOURCE_CODE #include "ux_api.h" #include "ux_hcd_ehci.h" #include "ux_host_stack.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _ux_hcd_ehci_interrupt_endpoint_destroy PORTABLE C */ /* 6.1.11 */ /* AUTHOR */ /* */ /* Chaoqiong Xiao, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function will destroy an interrupt endpoint. */ /* */ /* INPUT */ /* */ /* hcd_ehci Pointer to EHCI controller */ /* endpoint Pointer to endpoint */ /* */ /* OUTPUT */ /* */ /* Completion Status */ /* */ /* CALLS */ /* */ /* _ux_hcd_ehci_door_bell_wait Setup doorbell wait */ /* _ux_utility_physical_address Get physical address */ /* _ux_host_mutex_on Get mutex */ /* _ux_host_mutex_off Put mutex */ /* _ux_hcd_ehci_periodic_descriptor_link Link/unlink descriptor */ /* */ /* CALLED BY */ /* */ /* EHCI Controller Driver */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ /* resulting in version 6.1 */ /* 11-09-2020 Chaoqiong Xiao Modified comment(s), */ /* fixed compile warnings, */ /* resulting in version 6.1.2 */ /* 04-02-2021 Chaoqiong Xiao Modified comment(s), */ /* fixed compile issues with */ /* some macro options, */ /* resulting in version 6.1.6 */ /* 04-25-2022 Chaoqiong Xiao Modified comment(s), */ /* fixed standalone compile, */ /* resulting in version 6.1.11 */ /* */ /**************************************************************************/ UINT _ux_hcd_ehci_interrupt_endpoint_destroy(UX_HCD_EHCI *hcd_ehci, UX_ENDPOINT *endpoint) { UX_EHCI_ED *ed; UX_EHCI_ED *prev_ed; ULONG frindex; ULONG max_packet_size; /* From the endpoint container fetch the EHCI ED descriptor. */ ed = (UX_EHCI_ED *) endpoint -> ux_endpoint_ed; /* Access to periodic list. */ _ux_host_mutex_on(&hcd_ehci -> ux_hcd_ehci_periodic_mutex); /* Unlink the periodic item. */ _ux_hcd_ehci_periodic_descriptor_link(ed -> ux_ehci_ed_previous_ed, UX_NULL, UX_NULL, ed -> ux_ehci_ed_queue_head); /* Update the interrupt ED scan list. */ prev_ed = hcd_ehci -> ux_hcd_ehci_interrupt_ed_list; /* Check if ED in head of scan list. */ if (prev_ed == ed) /* Point head to the next ED. */ hcd_ehci -> ux_hcd_ehci_interrupt_ed_list = ed -> ux_ehci_ed_next_ed; else { /* Try to find previous ED in scan list. */ /* It's at head now. */ while(prev_ed -> ux_ehci_ed_next_ed) { /* The expected ED is found. */ if (prev_ed -> ux_ehci_ed_next_ed == ed) { /* Point next to next of the ED. */ prev_ed -> ux_ehci_ed_next_ed = ed -> ux_ehci_ed_next_ed; break; } /* Try next ED. */ prev_ed = prev_ed -> ux_ehci_ed_next_ed; } } /* Update micro-frame loads of anchor. */ /* Calculate max packet size. */ #if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE) if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE) max_packet_size = endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_PACKET_SIZE_MASK; else #endif { max_packet_size = endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_NUMBER_OF_TRANSACTIONS_MASK; max_packet_size >>= UX_MAX_NUMBER_OF_TRANSACTIONS_SHIFT; if (max_packet_size < 3) max_packet_size ++; max_packet_size *= endpoint -> ux_endpoint_descriptor.wMaxPacketSize & UX_MAX_PACKET_SIZE_MASK; } /* Update according to ED S-Mask. */ for(frindex = 0; frindex < 8; frindex ++) { /* Check schedule mask. */ if ((ed -> ux_ehci_ed_cap1 & (UX_EHCI_SMASK_0 << frindex))) { #if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE) /* Start split check. */ if (endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE) { /* Decrement the start split count. */ ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_ssplit_count[frindex] --; /* Check next endpoint if it's IN (load in C-Mask). */ if (endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) continue; } #endif /* Decrement the microframe load. */ ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)(ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - max_packet_size); /* S-Mask found, no C-Mask at the same time, skip C-Mask check. */ continue; } #if defined(UX_HCD_EHCI_SPLIT_TRANSFER_ENABLE) /* Complete split interrupt IN check in C-Mask. */ if ((endpoint -> ux_endpoint_device -> ux_device_speed != UX_HIGH_SPEED_DEVICE) && (endpoint -> ux_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) && (ed -> ux_ehci_ed_cap1 & (UX_EHCI_CMASK_0 << frindex))) { /* Decrement the microframe load. */ ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] = (USHORT)(ed -> REF_AS.INTR.ux_ehci_ed_anchor -> REF_AS.ANCHOR.ux_ehci_ed_microframe_load[frindex] - max_packet_size); } #endif } /* Release periodic list. */ _ux_host_mutex_off(&hcd_ehci -> ux_hcd_ehci_periodic_mutex); /* Arm the doorbell and wait for its completion. */ _ux_hcd_ehci_door_bell_wait(hcd_ehci); /* Now we can safely make the ED free. */ ed -> ux_ehci_ed_status = UX_UNUSED; /* Return successful completion. */ return(UX_SUCCESS); }