/* SPDX-License-Identifier: GPL-2.0+ */ /* * c67x00-hcd.h: Cypress C67X00 USB HCD * * Copyright (C) 2006-2008 Barco N.V. * Derived from the Cypress cy7c67200/300 ezusb linux driver and * based on multiple host controller drivers inside the linux kernel. */ #ifndef _USB_C67X00_HCD_H #define _USB_C67X00_HCD_H #include <linux/kernel.h> #include <linux/spinlock.h> #include <linux/list.h> #include <linux/usb.h> #include <linux/usb/hcd.h> #include "c67x00.h" /* * The following parameters depend on the CPU speed, bus speed, ... * These can be tuned for specific use cases, e.g. if isochronous transfers * are very important, bandwidth can be sacrificed to guarantee that the * 1ms deadline will be met. * If bulk transfers are important, the MAX_FRAME_BW can be increased, * but some (or many) isochronous deadlines might not be met. * * The values are specified in bittime. */ /* * The current implementation switches between _STD (default) and _ISO (when * isochronous transfers are scheduled), in order to optimize the throughput * in normal circumstances, but also provide good isochronous behaviour. * * Bandwidth is described in bit time so with a 12MHz USB clock and 1ms * frames; there are 12000 bit times per frame. */ #define TOTAL_FRAME_BW … #define DEFAULT_EOT … #define MAX_FRAME_BW_STD … #define MAX_FRAME_BW_ISO … /* * Periodic transfers may only use 90% of the full frame, but as * we currently don't even use 90% of the full frame, we may * use the full usable time for periodic transfers. */ #define MAX_PERIODIC_BW(full_bw) … /* -------------------------------------------------------------------------- */ struct c67x00_hcd { … }; static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd) { … } static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00) { … } /* --------------------------------------------------------------------- * Functions used by c67x00-drv */ int c67x00_hcd_probe(struct c67x00_sie *sie); void c67x00_hcd_remove(struct c67x00_sie *sie); /* --------------------------------------------------------------------- * Transfer Descriptor scheduling functions */ int c67x00_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags); int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); void c67x00_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep); void c67x00_sched_kick(struct c67x00_hcd *c67x00); int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00); void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00); #define c67x00_hcd_dev(x) … #endif /* _USB_C67X00_HCD_H */
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