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ca9e742b | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
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2 | /* |
3 | * c67x00-hcd.h: Cypress C67X00 USB HCD | |
4 | * | |
5 | * Copyright (C) 2006-2008 Barco N.V. | |
6 | * Derived from the Cypress cy7c67200/300 ezusb linux driver and | |
7 | * based on multiple host controller drivers inside the linux kernel. | |
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8 | */ |
9 | ||
10 | #ifndef _USB_C67X00_HCD_H | |
11 | #define _USB_C67X00_HCD_H | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/list.h> | |
16 | #include <linux/usb.h> | |
27729aad | 17 | #include <linux/usb/hcd.h> |
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18 | #include "c67x00.h" |
19 | ||
20 | /* | |
21 | * The following parameters depend on the CPU speed, bus speed, ... | |
22 | * These can be tuned for specific use cases, e.g. if isochronous transfers | |
25985edc | 23 | * are very important, bandwidth can be sacrificed to guarantee that the |
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24 | * 1ms deadline will be met. |
25 | * If bulk transfers are important, the MAX_FRAME_BW can be increased, | |
26 | * but some (or many) isochronous deadlines might not be met. | |
27 | * | |
28 | * The values are specified in bittime. | |
29 | */ | |
30 | ||
31 | /* | |
32 | * The current implementation switches between _STD (default) and _ISO (when | |
33 | * isochronous transfers are scheduled), in order to optimize the throughput | |
f3c1f515 | 34 | * in normal circumstances, but also provide good isochronous behaviour. |
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35 | * |
36 | * Bandwidth is described in bit time so with a 12MHz USB clock and 1ms | |
37 | * frames; there are 12000 bit times per frame. | |
38 | */ | |
39 | ||
40 | #define TOTAL_FRAME_BW 12000 | |
41 | #define DEFAULT_EOT 2250 | |
42 | ||
43 | #define MAX_FRAME_BW_STD (TOTAL_FRAME_BW - DEFAULT_EOT) | |
44 | #define MAX_FRAME_BW_ISO 2400 | |
45 | ||
46 | /* | |
47 | * Periodic transfers may only use 90% of the full frame, but as | |
48 | * we currently don't even use 90% of the full frame, we may | |
49 | * use the full usable time for periodic transfers. | |
50 | */ | |
51 | #define MAX_PERIODIC_BW(full_bw) full_bw | |
52 | ||
53 | /* -------------------------------------------------------------------------- */ | |
54 | ||
55 | struct c67x00_hcd { | |
56 | spinlock_t lock; | |
57 | struct c67x00_sie *sie; | |
58 | unsigned int low_speed_ports; /* bitmask of low speed ports */ | |
59 | unsigned int urb_count; | |
60 | unsigned int urb_iso_count; | |
61 | ||
62 | struct list_head list[4]; /* iso, int, ctrl, bulk */ | |
63 | #if PIPE_BULK != 3 | |
64 | #error "Sanity check failed, this code presumes PIPE_... to range from 0 to 3" | |
65 | #endif | |
66 | ||
67 | /* USB bandwidth allocated to td_list */ | |
68 | int bandwidth_allocated; | |
69 | /* USB bandwidth allocated for isoc/int transfer */ | |
70 | int periodic_bw_allocated; | |
71 | struct list_head td_list; | |
72 | int max_frame_bw; | |
73 | ||
74 | u16 td_base_addr; | |
75 | u16 buf_base_addr; | |
76 | u16 next_td_addr; | |
77 | u16 next_buf_addr; | |
78 | ||
60b4c9d5 | 79 | struct work_struct work; |
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80 | |
81 | struct completion endpoint_disable; | |
82 | ||
83 | u16 current_frame; | |
84 | u16 last_frame; | |
85 | }; | |
86 | ||
87 | static inline struct c67x00_hcd *hcd_to_c67x00_hcd(struct usb_hcd *hcd) | |
88 | { | |
89 | return (struct c67x00_hcd *)(hcd->hcd_priv); | |
90 | } | |
91 | ||
92 | static inline struct usb_hcd *c67x00_hcd_to_hcd(struct c67x00_hcd *c67x00) | |
93 | { | |
94 | return container_of((void *)c67x00, struct usb_hcd, hcd_priv); | |
95 | } | |
96 | ||
97 | /* --------------------------------------------------------------------- | |
98 | * Functions used by c67x00-drv | |
99 | */ | |
100 | ||
101 | int c67x00_hcd_probe(struct c67x00_sie *sie); | |
102 | void c67x00_hcd_remove(struct c67x00_sie *sie); | |
103 | ||
104 | /* --------------------------------------------------------------------- | |
105 | * Transfer Descriptor scheduling functions | |
106 | */ | |
107 | int c67x00_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags); | |
108 | int c67x00_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); | |
109 | void c67x00_endpoint_disable(struct usb_hcd *hcd, | |
110 | struct usb_host_endpoint *ep); | |
111 | ||
112 | void c67x00_hcd_msg_received(struct c67x00_sie *sie, u16 msg); | |
113 | void c67x00_sched_kick(struct c67x00_hcd *c67x00); | |
114 | int c67x00_sched_start_scheduler(struct c67x00_hcd *c67x00); | |
115 | void c67x00_sched_stop_scheduler(struct c67x00_hcd *c67x00); | |
116 | ||
117 | #define c67x00_hcd_dev(x) (c67x00_hcd_to_hcd(x)->self.controller) | |
118 | ||
119 | #endif /* _USB_C67X00_HCD_H */ |