134 lines
4.2 KiB
C
134 lines
4.2 KiB
C
|
/*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
||
|
|
* MA 02110-1301 USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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 "../core/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, bandwith 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 cicrumstances, 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 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 tasklet_struct tasklet;
|
||
|
|
|
||
|
|
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_hcd_msg_received(struct c67x00_sie *sie, u16 msg);
|
||
|
|
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 */
|