/* 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
* 1 ms 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 12 MHz USB clock and 1 ms
* frames ; there are 12000 bit times per frame .
*/
#define TOTAL_FRAME_BW 12000
#define DEFAULT_EOT 2250
#define MAX_FRAME_BW_STD (TOTAL_FRAME_BW - DEFAULT_EOT)
#define MAX_FRAME_BW_ISO 2400
/*
* 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) full_bw
/* -------------------------------------------------------------------------- */
struct c67x00_hcd {
spinlock_t lock;
struct c67x00_sie *sie;
unsigned int low_speed_ports; /* bitmask of low speed ports */
unsigned int urb_count;
unsigned int urb_iso_count;
struct list_head list[4 ]; /* iso, int, ctrl, bulk */
#if PIPE_BULK != 3
#error "Sanity check failed, this code presumes PIPE_... to range from 0 to 3"
#endif
/* USB bandwidth allocated to td_list */
int bandwidth_allocated;
/* USB bandwidth allocated for isoc/int transfer */
int periodic_bw_allocated;
struct list_head td_list;
int max_frame_bw;
u16 td_base_addr;
u16 buf_base_addr;
u16 next_td_addr;
u16 next_buf_addr;
struct work_struct work;
struct completion endpoint_disable;
u16 current_frame;
u16 last_frame;
};
static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd)
{
return (struct c67x00_hcd *)(hcd->hcd_priv);
}
static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00)
{
return container_of((void *)c67x00, struct usb_hcd, hcd_priv);
}
/* ---------------------------------------------------------------------
* 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) (c67x00_hcd_to_hcd(x)->self.controller)
#endif /* _USB_C67X00_HCD_H */
Messung V0.5 in Prozent C=90 H=94 G=91
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(vorverarbeitet am 2026-10-11)
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