Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * | |
3 | * Includes for cdc-acm.c | |
4 | * | |
5 | * Mainly take from usbnet's cdc-ether part | |
6 | * | |
7 | */ | |
8 | ||
9 | /* | |
10 | * CMSPAR, some architectures can't have space and mark parity. | |
11 | */ | |
12 | ||
13 | #ifndef CMSPAR | |
14 | #define CMSPAR 0 | |
15 | #endif | |
16 | ||
17 | /* | |
18 | * Major and minor numbers. | |
19 | */ | |
20 | ||
21 | #define ACM_TTY_MAJOR 166 | |
22 | #define ACM_TTY_MINORS 32 | |
23 | ||
24 | /* | |
25 | * Requests. | |
26 | */ | |
27 | ||
28 | #define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE) | |
29 | ||
30 | /* | |
31 | * Output control lines. | |
32 | */ | |
33 | ||
34 | #define ACM_CTRL_DTR 0x01 | |
35 | #define ACM_CTRL_RTS 0x02 | |
36 | ||
37 | /* | |
38 | * Input control lines and line errors. | |
39 | */ | |
40 | ||
41 | #define ACM_CTRL_DCD 0x01 | |
42 | #define ACM_CTRL_DSR 0x02 | |
43 | #define ACM_CTRL_BRK 0x04 | |
44 | #define ACM_CTRL_RI 0x08 | |
45 | ||
46 | #define ACM_CTRL_FRAMING 0x10 | |
47 | #define ACM_CTRL_PARITY 0x20 | |
48 | #define ACM_CTRL_OVERRUN 0x40 | |
49 | ||
50 | /* | |
51 | * Internal driver structures. | |
52 | */ | |
53 | ||
884b600f ON |
54 | /* |
55 | * The only reason to have several buffers is to accomodate assumptions | |
56 | * in line disciplines. They ask for empty space amount, receive our URB size, | |
57 | * and proceed to issue several 1-character writes, assuming they will fit. | |
58 | * The very first write takes a complete URB. Fortunately, this only happens | |
86478944 ON |
59 | * when processing onlcr, so we only need 2 buffers. These values must be |
60 | * powers of 2. | |
884b600f | 61 | */ |
86478944 ON |
62 | #define ACM_NW 2 |
63 | #define ACM_NR 16 | |
61a87adf | 64 | |
884b600f ON |
65 | struct acm_wb { |
66 | unsigned char *buf; | |
67 | dma_addr_t dmah; | |
68 | int len; | |
69 | int use; | |
70 | }; | |
71 | ||
61a87adf DK |
72 | struct acm_rb { |
73 | struct list_head list; | |
74 | int size; | |
75 | unsigned char *base; | |
76 | dma_addr_t dma; | |
77 | }; | |
78 | ||
79 | struct acm_ru { | |
80 | struct list_head list; | |
81 | struct acm_rb *buffer; | |
82 | struct urb *urb; | |
83 | struct acm *instance; | |
84 | }; | |
85 | ||
1da177e4 LT |
86 | struct acm { |
87 | struct usb_device *dev; /* the corresponding usb device */ | |
88 | struct usb_interface *control; /* control interface */ | |
89 | struct usb_interface *data; /* data interface */ | |
90 | struct tty_struct *tty; /* the corresponding tty */ | |
61a87adf DK |
91 | struct urb *ctrlurb, *writeurb; /* urbs */ |
92 | u8 *ctrl_buffer; /* buffers of urbs */ | |
93 | dma_addr_t ctrl_dma; /* dma handles of buffers */ | |
86478944 ON |
94 | struct acm_wb wb[ACM_NW]; |
95 | struct acm_ru ru[ACM_NR]; | |
96 | struct acm_rb rb[ACM_NR]; | |
97 | int rx_buflimit; | |
61a87adf DK |
98 | int rx_endpoint; |
99 | spinlock_t read_lock; | |
100 | struct list_head spare_read_urbs; | |
101 | struct list_head spare_read_bufs; | |
102 | struct list_head filled_read_bufs; | |
884b600f ON |
103 | int write_current; /* current write buffer */ |
104 | int write_used; /* number of non-empty write buffers */ | |
105 | int write_ready; /* write urb is not running */ | |
106 | spinlock_t write_lock; | |
1da177e4 LT |
107 | struct usb_cdc_line_coding line; /* bits, stop, parity */ |
108 | struct work_struct work; /* work queue entry for line discipline waking up */ | |
61a87adf | 109 | struct tasklet_struct urb_task; /* rx processing */ |
1da177e4 LT |
110 | spinlock_t throttle_lock; /* synchronize throtteling and read callback */ |
111 | unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ | |
112 | unsigned int ctrlout; /* output control lines (DTR, RTS) */ | |
113 | unsigned int writesize; /* max packet size for the output bulk endpoint */ | |
114 | unsigned int readsize,ctrlsize; /* buffer sizes for freeing */ | |
115 | unsigned int used; /* someone has this acm's device open */ | |
116 | unsigned int minor; /* acm minor number */ | |
117 | unsigned char throttle; /* throttled by tty layer */ | |
118 | unsigned char clocal; /* termios CLOCAL */ | |
1da177e4 LT |
119 | unsigned int ctrl_caps; /* control capabilities from the class specific header */ |
120 | }; | |
121 | ||
122 | #define CDC_DATA_INTERFACE_TYPE 0x0a | |
123 | ||
124 | /* constants describing various quirks and errors */ | |
125 | #define NO_UNION_NORMAL 1 | |
86478944 | 126 | #define SINGLE_RX_URB 2 |