1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * udc.h - ChipIdea UDC structures |
4 | * |
5 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. |
6 | * |
7 | * Author: David Lopo |
8 | */ |
9 | |
10 | #ifndef __DRIVERS_USB_CHIPIDEA_UDC_H |
11 | #define __DRIVERS_USB_CHIPIDEA_UDC_H |
12 | |
13 | #include <linux/list.h> |
14 | |
15 | #define CTRL_PAYLOAD_MAX 64 |
16 | #define RX 0 /* similar to USB_DIR_OUT but can be used as an index */ |
17 | #define TX 1 /* similar to USB_DIR_IN but can be used as an index */ |
18 | |
19 | /* DMA layout of transfer descriptors */ |
20 | struct ci_hw_td { |
21 | /* 0 */ |
22 | __le32 next; |
23 | #define TD_TERMINATE BIT(0) |
24 | #define TD_ADDR_MASK (0xFFFFFFEUL << 5) |
25 | /* 1 */ |
26 | __le32 token; |
27 | #define TD_STATUS (0x00FFUL << 0) |
28 | #define TD_STATUS_TR_ERR BIT(3) |
29 | #define TD_STATUS_DT_ERR BIT(5) |
30 | #define TD_STATUS_HALTED BIT(6) |
31 | #define TD_STATUS_ACTIVE BIT(7) |
32 | #define TD_MULTO (0x0003UL << 10) |
33 | #define TD_IOC BIT(15) |
34 | #define TD_TOTAL_BYTES (0x7FFFUL << 16) |
35 | /* 2 */ |
36 | __le32 page[5]; |
37 | #define TD_CURR_OFFSET (0x0FFFUL << 0) |
38 | #define TD_FRAME_NUM (0x07FFUL << 0) |
39 | #define TD_RESERVED_MASK (0x0FFFUL << 0) |
40 | } __attribute__ ((packed, aligned(4))); |
41 | |
42 | /* DMA layout of queue heads */ |
43 | struct ci_hw_qh { |
44 | /* 0 */ |
45 | __le32 cap; |
46 | #define QH_IOS BIT(15) |
47 | #define QH_MAX_PKT (0x07FFUL << 16) |
48 | #define QH_ZLT BIT(29) |
49 | #define QH_MULT (0x0003UL << 30) |
50 | #define QH_ISO_MULT(x) ((x >> 11) & 0x03) |
51 | /* 1 */ |
52 | __le32 curr; |
53 | /* 2 - 8 */ |
54 | struct ci_hw_td td; |
55 | /* 9 */ |
56 | __le32 RESERVED; |
57 | struct usb_ctrlrequest setup; |
58 | } __attribute__ ((packed, aligned(4))); |
59 | |
60 | struct td_node { |
61 | struct list_head td; |
62 | dma_addr_t dma; |
63 | struct ci_hw_td *ptr; |
64 | int td_remaining_size; |
65 | }; |
66 | |
67 | /** |
68 | * struct ci_hw_req - usb request representation |
69 | * @req: request structure for gadget drivers |
70 | * @queue: link to QH list |
71 | * @tds: link to TD list |
72 | */ |
73 | struct ci_hw_req { |
74 | struct usb_request req; |
75 | struct list_head queue; |
76 | struct list_head tds; |
77 | }; |
78 | |
79 | #ifdef CONFIG_USB_CHIPIDEA_UDC |
80 | |
81 | int ci_hdrc_gadget_init(struct ci_hdrc *ci); |
82 | void ci_hdrc_gadget_destroy(struct ci_hdrc *ci); |
83 | |
84 | #else |
85 | |
86 | static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci) |
87 | { |
88 | return -ENXIO; |
89 | } |
90 | |
91 | static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci) |
92 | { |
93 | |
94 | } |
95 | |
96 | #endif |
97 | |
98 | #endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */ |
99 | |