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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 */
20struct 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 */
43struct 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
60struct 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 */
73struct 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
81int ci_hdrc_gadget_init(struct ci_hdrc *ci);
82void ci_hdrc_gadget_destroy(struct ci_hdrc *ci);
83
84#else
85
86static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci)
87{
88 return -ENXIO;
89}
90
91static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
92{
93
94}
95
96#endif
97
98#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */
1/*
2 * udc.h - ChipIdea UDC structures
3 *
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
5 *
6 * Author: David Lopo
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
14#define __DRIVERS_USB_CHIPIDEA_UDC_H
15
16#include <linux/list.h>
17
18#define CTRL_PAYLOAD_MAX 64
19#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */
20#define TX 1 /* similar to USB_DIR_IN but can be used as an index */
21
22/* DMA layout of transfer descriptors */
23struct ci_hw_td {
24 /* 0 */
25 u32 next;
26#define TD_TERMINATE BIT(0)
27#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
28 /* 1 */
29 u32 token;
30#define TD_STATUS (0x00FFUL << 0)
31#define TD_STATUS_TR_ERR BIT(3)
32#define TD_STATUS_DT_ERR BIT(5)
33#define TD_STATUS_HALTED BIT(6)
34#define TD_STATUS_ACTIVE BIT(7)
35#define TD_MULTO (0x0003UL << 10)
36#define TD_IOC BIT(15)
37#define TD_TOTAL_BYTES (0x7FFFUL << 16)
38 /* 2 */
39 u32 page[5];
40#define TD_CURR_OFFSET (0x0FFFUL << 0)
41#define TD_FRAME_NUM (0x07FFUL << 0)
42#define TD_RESERVED_MASK (0x0FFFUL << 0)
43} __attribute__ ((packed, aligned(4)));
44
45/* DMA layout of queue heads */
46struct ci_hw_qh {
47 /* 0 */
48 u32 cap;
49#define QH_IOS BIT(15)
50#define QH_MAX_PKT (0x07FFUL << 16)
51#define QH_ZLT BIT(29)
52#define QH_MULT (0x0003UL << 30)
53#define QH_ISO_MULT(x) ((x >> 11) & 0x03)
54 /* 1 */
55 u32 curr;
56 /* 2 - 8 */
57 struct ci_hw_td td;
58 /* 9 */
59 u32 RESERVED;
60 struct usb_ctrlrequest setup;
61} __attribute__ ((packed, aligned(4)));
62
63struct td_node {
64 struct list_head td;
65 dma_addr_t dma;
66 struct ci_hw_td *ptr;
67};
68
69/**
70 * struct ci_hw_req - usb request representation
71 * @req: request structure for gadget drivers
72 * @queue: link to QH list
73 * @ptr: transfer descriptor for this request
74 * @dma: dma address for the transfer descriptor
75 * @zptr: transfer descriptor for the zero packet
76 * @zdma: dma address of the zero packet's transfer descriptor
77 */
78struct ci_hw_req {
79 struct usb_request req;
80 struct list_head queue;
81 struct list_head tds;
82};
83
84#ifdef CONFIG_USB_CHIPIDEA_UDC
85
86int ci_hdrc_gadget_init(struct ci_hdrc *ci);
87void ci_hdrc_gadget_destroy(struct ci_hdrc *ci);
88
89#else
90
91static inline int ci_hdrc_gadget_init(struct ci_hdrc *ci)
92{
93 return -ENXIO;
94}
95
96static inline void ci_hdrc_gadget_destroy(struct ci_hdrc *ci)
97{
98
99}
100
101#endif
102
103#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */