/* * 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 #include #include #include #include #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 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 */ ion value='0' selected='selected'>includemode:
Diffstat (limited to 'drivers/usb/usbip')