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12c3de7ef7
Now that the SPDX tag is in all USB files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* c67x00-hcd.h: Cypress C67X00 USB HCD
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*
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* Copyright (C) 2006-2008 Barco N.V.
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* Derived from the Cypress cy7c67200/300 ezusb linux driver and
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* based on multiple host controller drivers inside the linux kernel.
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*/
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#ifndef _USB_C67X00_HCD_H
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#define _USB_C67X00_HCD_H
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#include <linux/kernel.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "c67x00.h"
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/*
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* The following parameters depend on the CPU speed, bus speed, ...
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* These can be tuned for specific use cases, e.g. if isochronous transfers
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* are very important, bandwidth can be sacrificed to guarantee that the
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* 1ms deadline will be met.
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* If bulk transfers are important, the MAX_FRAME_BW can be increased,
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* but some (or many) isochronous deadlines might not be met.
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*
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* The values are specified in bittime.
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*/
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/*
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* The current implementation switches between _STD (default) and _ISO (when
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* isochronous transfers are scheduled), in order to optimize the throughput
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* in normal circumstances, but also provide good isochronous behaviour.
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*
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* Bandwidth is described in bit time so with a 12MHz USB clock and 1ms
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* frames; there are 12000 bit times per frame.
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*/
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#define TOTAL_FRAME_BW 12000
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#define DEFAULT_EOT 2250
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#define MAX_FRAME_BW_STD (TOTAL_FRAME_BW - DEFAULT_EOT)
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#define MAX_FRAME_BW_ISO 2400
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/*
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* Periodic transfers may only use 90% of the full frame, but as
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* we currently don't even use 90% of the full frame, we may
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* use the full usable time for periodic transfers.
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*/
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#define MAX_PERIODIC_BW(full_bw) full_bw
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/* -------------------------------------------------------------------------- */
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struct c67x00_hcd {
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spinlock_t lock;
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struct c67x00_sie *sie;
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unsigned int low_speed_ports; /* bitmask of low speed ports */
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unsigned int urb_count;
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unsigned int urb_iso_count;
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struct list_head list[4]; /* iso, int, ctrl, bulk */
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#if PIPE_BULK != 3
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#error "Sanity check failed, this code presumes PIPE_... to range from 0 to 3"
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#endif
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/* USB bandwidth allocated to td_list */
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int bandwidth_allocated;
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/* USB bandwidth allocated for isoc/int transfer */
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int periodic_bw_allocated;
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struct list_head td_list;
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int max_frame_bw;
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u16 td_base_addr;
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u16 buf_base_addr;
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u16 next_td_addr;
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u16 next_buf_addr;
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struct tasklet_struct tasklet;
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struct completion endpoint_disable;
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u16 current_frame;
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u16 last_frame;
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};
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static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd)
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{
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return (struct c67x00_hcd *)(hcd->hcd_priv);
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}
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static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00)
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{
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return container_of((void *)c67x00, struct usb_hcd, hcd_priv);
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}
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/* ---------------------------------------------------------------------
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* Functions used by c67x00-drv
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*/
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int c67x00_hcd_probe(struct c67x00_sie *sie);
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void c67x00_hcd_remove(struct c67x00_sie *sie);
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/* ---------------------------------------------------------------------
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* Transfer Descriptor scheduling functions
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*/
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int c67x00_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
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int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
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void c67x00_endpoint_disable(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep);
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void c67x00_hcd_msg_received(struct c67x00_sie *sie, u16 msg);
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void c67x00_sched_kick(struct c67x00_hcd *c67x00);
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int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00);
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void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00);
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#define c67x00_hcd_dev(x) (c67x00_hcd_to_hcd(x)->self.controller)
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#endif /* _USB_C67X00_HCD_H */
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