tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 ci13xxx_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 ci13xxx_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 /* 1 */
54 u32 curr;
55 /* 2 - 8 */
56 struct ci13xxx_td td;
57 /* 9 */
58 u32 RESERVED;
59 struct usb_ctrlrequest setup;
60} __attribute__ ((packed, aligned(4)));
61
62/**
63 * struct ci13xxx_req - usb request representation
64 * @req: request structure for gadget drivers
65 * @queue: link to QH list
66 * @ptr: transfer descriptor for this request
67 * @dma: dma address for the transfer descriptor
68 * @zptr: transfer descriptor for the zero packet
69 * @zdma: dma address of the zero packet's transfer descriptor
70 */
71struct ci13xxx_req {
72 struct usb_request req;
73 struct list_head queue;
74 struct ci13xxx_td *ptr;
75 dma_addr_t dma;
76 struct ci13xxx_td *zptr;
77 dma_addr_t zdma;
78};
79
80#ifdef CONFIG_USB_CHIPIDEA_UDC
81
82int ci_hdrc_gadget_init(struct ci13xxx *ci);
83
84#else
85
86static inline int ci_hdrc_gadget_init(struct ci13xxx *ci)
87{
88 return -ENXIO;
89}
90
91#endif
92
93#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */