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119 lines
3.5 KiB
119 lines
3.5 KiB
/* 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 work_struct work; |
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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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