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Linux kernel mirror (for testing)
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kernel
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linux
1/*
2 * USB CDC NCM auxiliary definitions
3 */
4
5#ifndef __LINUX_USB_NCM_H
6#define __LINUX_USB_NCM_H
7
8#include <linux/types.h>
9#include <linux/usb/cdc.h>
10#include <asm/unaligned.h>
11
12#define NCM_NTB_MIN_IN_SIZE 2048
13#define NCM_NTB_MIN_OUT_SIZE 2048
14
15#define NCM_CONTROL_TIMEOUT (5 * 1000)
16
17/* bmNetworkCapabilities */
18
19#define NCM_NCAP_ETH_FILTER (1 << 0)
20#define NCM_NCAP_NET_ADDRESS (1 << 1)
21#define NCM_NCAP_ENCAP_COMM (1 << 2)
22#define NCM_NCAP_MAX_DGRAM (1 << 3)
23#define NCM_NCAP_CRC_MODE (1 << 4)
24
25/*
26 * Here are options for NCM Datagram Pointer table (NDP) parser.
27 * There are 2 different formats: NDP16 and NDP32 in the spec (ch. 3),
28 * in NDP16 offsets and sizes fields are 1 16bit word wide,
29 * in NDP32 -- 2 16bit words wide. Also signatures are different.
30 * To make the parser code the same, put the differences in the structure,
31 * and switch pointers to the structures when the format is changed.
32 */
33
34struct ndp_parser_opts {
35 u32 nth_sign;
36 u32 ndp_sign;
37 unsigned nth_size;
38 unsigned ndp_size;
39 unsigned ndplen_align;
40 /* sizes in u16 units */
41 unsigned dgram_item_len; /* index or length */
42 unsigned block_length;
43 unsigned fp_index;
44 unsigned reserved1;
45 unsigned reserved2;
46 unsigned next_fp_index;
47};
48
49#define INIT_NDP16_OPTS { \
50 .nth_sign = NCM_NTH16_SIGN, \
51 .ndp_sign = NCM_NDP16_NOCRC_SIGN, \
52 .nth_size = sizeof(struct usb_cdc_ncm_nth16), \
53 .ndp_size = sizeof(struct usb_cdc_ncm_ndp16), \
54 .ndplen_align = 4, \
55 .dgram_item_len = 1, \
56 .block_length = 1, \
57 .fp_index = 1, \
58 .reserved1 = 0, \
59 .reserved2 = 0, \
60 .next_fp_index = 1, \
61 }
62
63
64#define INIT_NDP32_OPTS { \
65 .nth_sign = NCM_NTH32_SIGN, \
66 .ndp_sign = NCM_NDP32_NOCRC_SIGN, \
67 .nth_size = sizeof(struct usb_cdc_ncm_nth32), \
68 .ndp_size = sizeof(struct usb_cdc_ncm_ndp32), \
69 .ndplen_align = 8, \
70 .dgram_item_len = 2, \
71 .block_length = 2, \
72 .fp_index = 2, \
73 .reserved1 = 1, \
74 .reserved2 = 2, \
75 .next_fp_index = 2, \
76 }
77
78static inline void put_ncm(__le16 **p, unsigned size, unsigned val)
79{
80 switch (size) {
81 case 1:
82 put_unaligned_le16((u16)val, *p);
83 break;
84 case 2:
85 put_unaligned_le32((u32)val, *p);
86
87 break;
88 default:
89 BUG();
90 }
91
92 *p += size;
93}
94
95static inline unsigned get_ncm(__le16 **p, unsigned size)
96{
97 unsigned tmp;
98
99 switch (size) {
100 case 1:
101 tmp = get_unaligned_le16(*p);
102 break;
103 case 2:
104 tmp = get_unaligned_le32(*p);
105 break;
106 default:
107 BUG();
108 }
109
110 *p += size;
111 return tmp;
112}
113
114#endif /* __LINUX_USB_NCM_H */