// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015 MediaTek Inc. * Author: * Zhigang.Wei <[email protected]> * Chunfeng.Yun <[email protected]> */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> #include "xhci.h" #include "xhci-mtk.h" #define SSP_BW_BOUNDARY … #define SS_BW_BOUNDARY … /* table 5-5. High-speed Isoc Transaction Limits in usb_20 spec */ #define HS_BW_BOUNDARY … /* usb2 spec section11.18.1: at most 188 FS bytes per microframe */ #define FS_PAYLOAD_MAX … #define LS_PAYLOAD_MAX … /* section 11.18.1, per fs frame */ #define FS_BW_BOUNDARY … #define LS_BW_BOUNDARY … /* * max number of microframes for split transfer, assume extra-cs budget is 0 * for fs isoc in : 1 ss + 1 idle + 6 cs (roundup(1023/188)) */ #define TT_MICROFRAMES_MAX … /* offset from SS for fs/ls isoc/intr ep (ss + idle) */ #define CS_OFFSET … #define DBG_BUF_EN … /* schedule error type */ #define ESCH_SS_Y6 … #define ESCH_SS_OVERLAP … #define ESCH_CS_OVERFLOW … #define ESCH_BW_OVERFLOW … #define ESCH_FIXME … /* mtk scheduler bitmasks */ #define EP_BPKTS(p) … #define EP_BCSCOUNT(p) … #define EP_BBM(p) … #define EP_BOFFSET(p) … #define EP_BREPEAT(p) … static char *sch_error_string(int err_num) { … } static int is_fs_or_ls(enum usb_device_speed speed) { … } static const char * decode_ep(struct usb_host_endpoint *ep, enum usb_device_speed speed) { … } static u32 get_bw_boundary(enum usb_device_speed speed) { … } /* * get the bandwidth domain which @ep belongs to. * * the bandwidth domain array is saved to @sch_array of struct xhci_hcd_mtk, * each HS root port is treated as a single bandwidth domain, * but each SS root port is treated as two bandwidth domains, one for IN eps, * one for OUT eps. */ static struct mu3h_sch_bw_info * get_bw_info(struct xhci_hcd_mtk *mtk, struct usb_device *udev, struct usb_host_endpoint *ep) { … } static u32 get_esit(struct xhci_ep_ctx *ep_ctx) { … } static struct mu3h_sch_tt *find_tt(struct usb_device *udev) { … } /* Release the TT above udev, if it's not in use */ static void drop_tt(struct usb_device *udev) { … } static struct mu3h_sch_ep_info * create_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev, struct usb_host_endpoint *ep, struct xhci_ep_ctx *ep_ctx) { … } static void setup_sch_info(struct xhci_ep_ctx *ep_ctx, struct mu3h_sch_ep_info *sch_ep) { … } /* Get maximum bandwidth when we schedule at offset slot. */ static u32 get_max_bw(struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep, u32 offset) { … } /* * for OUT: get first SS consumed bw; * for IN: get first CS consumed bw; */ static u16 get_fs_bw(struct mu3h_sch_ep_info *sch_ep, int offset) { … } static void update_bus_bw(struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep, bool used) { … } static int check_ls_budget_microframes(struct mu3h_sch_ep_info *sch_ep, int offset) { … } static int check_fs_budget_microframes(struct mu3h_sch_ep_info *sch_ep, int offset) { … } static int check_fs_budget_frames(struct mu3h_sch_ep_info *sch_ep, int offset) { … } static int check_fs_bus_bw(struct mu3h_sch_ep_info *sch_ep, int offset) { … } static int check_ss_and_cs(struct mu3h_sch_ep_info *sch_ep, u32 offset) { … } /* * when isoc-out transfers 188 bytes in a uframe, and send isoc/intr's * ss token in the uframe, may cause 'bit stuff error' in downstream * port; * when isoc-out transfer less than 188 bytes in a uframe, shall send * isoc-in's ss after isoc-out's ss (but hw can't ensure the sequence, * so just avoid overlap). */ static int check_isoc_ss_overlap(struct mu3h_sch_ep_info *sch_ep, u32 offset) { … } static int check_sch_tt_budget(struct mu3h_sch_ep_info *sch_ep, u32 offset) { … } /* allocate microframes in the ls/fs frame */ static int alloc_sch_portion_of_frame(struct mu3h_sch_ep_info *sch_ep) { … } static void update_sch_tt(struct mu3h_sch_ep_info *sch_ep, bool used) { … } static int load_ep_bw(struct mu3h_sch_bw_info *sch_bw, struct mu3h_sch_ep_info *sch_ep, bool loaded) { … } /* allocate microframes for hs/ss/ssp */ static int alloc_sch_microframes(struct mu3h_sch_ep_info *sch_ep) { … } static int check_sch_bw(struct mu3h_sch_ep_info *sch_ep) { … } static void destroy_sch_ep(struct xhci_hcd_mtk *mtk, struct usb_device *udev, struct mu3h_sch_ep_info *sch_ep) { … } static bool need_bw_sch(struct usb_device *udev, struct usb_host_endpoint *ep) { … } int xhci_mtk_sch_init(struct xhci_hcd_mtk *mtk) { … } void xhci_mtk_sch_exit(struct xhci_hcd_mtk *mtk) { … } static int add_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep) { … } static void drop_ep_quirk(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep) { … } int xhci_mtk_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) { … } void xhci_mtk_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev) { … } int xhci_mtk_add_ep(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep) { … } int xhci_mtk_drop_ep(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep) { … }
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