Merge commit 'v3.4.4' into android-tegra-nv-3.4
[linux-2.6.git] / drivers / usb / class / cdc-acm.h
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
54 /*
55  * The only reason to have several buffers is to accommodate 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
59  * when processing onlcr, so we only need 2 buffers. These values must be
60  * powers of 2.
61  */
62 #define ACM_NW  16
63 #define ACM_NR  16
64
65 struct acm_wb {
66         unsigned char *buf;
67         dma_addr_t dmah;
68         int len;
69         int use;
70         struct urb              *urb;
71         struct acm              *instance;
72 };
73
74 struct acm_rb {
75         int                     size;
76         unsigned char           *base;
77         dma_addr_t              dma;
78         int                     index;
79         struct acm              *instance;
80 };
81
82 struct acm {
83         struct usb_device *dev;                         /* the corresponding usb device */
84         struct usb_interface *control;                  /* control interface */
85         struct usb_interface *data;                     /* data interface */
86         struct tty_port port;                           /* our tty port data */
87         struct urb *ctrlurb;                            /* urbs */
88         u8 *ctrl_buffer;                                /* buffers of urbs */
89         dma_addr_t ctrl_dma;                            /* dma handles of buffers */
90         u8 *country_codes;                              /* country codes from device */
91         unsigned int country_code_size;                 /* size of this buffer */
92         unsigned int country_rel_date;                  /* release date of version */
93         struct acm_wb wb[ACM_NW];
94         unsigned long read_urbs_free;
95         struct urb *read_urbs[ACM_NR];
96         struct acm_rb read_buffers[ACM_NR];
97         int rx_buflimit;
98         int rx_endpoint;
99         spinlock_t read_lock;
100         int write_used;                                 /* number of non-empty write buffers */
101         int transmitting;
102         spinlock_t write_lock;
103         struct mutex mutex;
104         bool disconnected;
105         struct usb_cdc_line_coding line;                /* bits, stop, parity */
106         struct work_struct work;                        /* work queue entry for line discipline waking up */
107         unsigned int ctrlin;                            /* input control lines (DCD, DSR, RI, break, overruns) */
108         unsigned int ctrlout;                           /* output control lines (DTR, RTS) */
109         unsigned int writesize;                         /* max packet size for the output bulk endpoint */
110         unsigned int readsize,ctrlsize;                 /* buffer sizes for freeing */
111         unsigned int minor;                             /* acm minor number */
112         unsigned char clocal;                           /* termios CLOCAL */
113         unsigned int ctrl_caps;                         /* control capabilities from the class specific header */
114         unsigned int susp_count;                        /* number of suspended interfaces */
115         unsigned int combined_interfaces:1;             /* control and data collapsed */
116         unsigned int is_int_ep:1;                       /* interrupt endpoints contrary to spec used */
117         unsigned int throttled:1;                       /* actually throttled */
118         unsigned int throttle_req:1;                    /* throttle requested */
119         unsigned int no_hangup_in_reset_resume:1;       /* do not call tty_hangup in acm_reset_resume */
120         u8 bInterval;
121         struct acm_wb *delayed_wb;                      /* write queued for a device about to be woken */
122         struct usb_anchor       deferred;
123 };
124
125 #define CDC_DATA_INTERFACE_TYPE 0x0a
126
127 /* constants describing various quirks and errors */
128 #define NO_UNION_NORMAL                 1
129 #define SINGLE_RX_URB                   2
130 #define NO_CAP_LINE                     4
131 #define NOT_A_MODEM                     8
132 #define NO_DATA_INTERFACE               16
133 #define NOT_REAL_ACM                    32
134 #define NO_HANGUP_IN_RESET_RESUME       64