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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
e443b333 AS |
2 | /* |
3 | * udc.h - ChipIdea UDC structures | |
4 | * | |
5 | * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved. | |
6 | * | |
7 | * Author: David Lopo | |
e443b333 AS |
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 */ | |
8e22978c | 20 | struct ci_hw_td { |
e443b333 | 21 | /* 0 */ |
34445fb4 | 22 | __le32 next; |
e443b333 AS |
23 | #define TD_TERMINATE BIT(0) |
24 | #define TD_ADDR_MASK (0xFFFFFFEUL << 5) | |
25 | /* 1 */ | |
34445fb4 | 26 | __le32 token; |
e443b333 AS |
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 */ | |
34445fb4 | 36 | __le32 page[5]; |
e443b333 AS |
37 | #define TD_CURR_OFFSET (0x0FFFUL << 0) |
38 | #define TD_FRAME_NUM (0x07FFUL << 0) | |
39 | #define TD_RESERVED_MASK (0x0FFFUL << 0) | |
a9c17430 | 40 | } __attribute__ ((packed, aligned(4))); |
e443b333 AS |
41 | |
42 | /* DMA layout of queue heads */ | |
8e22978c | 43 | struct ci_hw_qh { |
e443b333 | 44 | /* 0 */ |
34445fb4 | 45 | __le32 cap; |
e443b333 AS |
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) | |
e4ce4ecd | 50 | #define QH_ISO_MULT(x) ((x >> 11) & 0x03) |
e443b333 | 51 | /* 1 */ |
34445fb4 | 52 | __le32 curr; |
e443b333 | 53 | /* 2 - 8 */ |
8e22978c | 54 | struct ci_hw_td td; |
e443b333 | 55 | /* 9 */ |
34445fb4 | 56 | __le32 RESERVED; |
e443b333 | 57 | struct usb_ctrlrequest setup; |
a9c17430 | 58 | } __attribute__ ((packed, aligned(4))); |
e443b333 | 59 | |
cc9e6c49 MG |
60 | struct td_node { |
61 | struct list_head td; | |
62 | dma_addr_t dma; | |
8e22978c | 63 | struct ci_hw_td *ptr; |
cc9e6c49 MG |
64 | }; |
65 | ||
551a8ac6 | 66 | /** |
8e22978c | 67 | * struct ci_hw_req - usb request representation |
551a8ac6 | 68 | * @req: request structure for gadget drivers |
551a8ac6 AS |
69 | * @queue: link to QH list |
70 | * @ptr: transfer descriptor for this request | |
71 | * @dma: dma address for the transfer descriptor | |
72 | * @zptr: transfer descriptor for the zero packet | |
73 | * @zdma: dma address of the zero packet's transfer descriptor | |
74 | */ | |
8e22978c | 75 | struct ci_hw_req { |
551a8ac6 | 76 | struct usb_request req; |
551a8ac6 | 77 | struct list_head queue; |
cc9e6c49 | 78 | struct list_head tds; |
e443b333 AS |
79 | }; |
80 | ||
81 | #ifdef CONFIG_USB_CHIPIDEA_UDC | |
5f36e231 | 82 | |
8e22978c | 83 | int ci_hdrc_gadget_init(struct ci_hdrc *ci); |
3f124d23 | 84 | void ci_hdrc_gadget_destroy(struct ci_hdrc *ci); |
5f36e231 | 85 | |
e443b333 | 86 | #else |
e443b333 | 87 | |
8e22978c | 88 | static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci) |
e443b333 | 89 | { |
5f36e231 | 90 | return -ENXIO; |
e443b333 AS |
91 | } |
92 | ||
3f124d23 PC |
93 | static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci) |
94 | { | |
95 | ||
96 | } | |
97 | ||
e443b333 AS |
98 | #endif |
99 | ||
100 | #endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */ |