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 | |
65c35dd5 | 22 | #define ACM_TTY_MINORS 256 |
1da177e4 LT |
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 | 54 | /* |
25985edc | 55 | * The only reason to have several buffers is to accommodate assumptions |
884b600f ON |
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 | */ |
e4cf3aa8 | 62 | #define ACM_NW 16 |
86478944 | 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; | |
e4cf3aa8 DE |
70 | struct urb *urb; |
71 | struct acm *instance; | |
884b600f ON |
72 | }; |
73 | ||
61a87adf | 74 | struct acm_rb { |
61a87adf DK |
75 | int size; |
76 | unsigned char *base; | |
77 | dma_addr_t dma; | |
088c64f8 | 78 | int index; |
61a87adf DK |
79 | struct acm *instance; |
80 | }; | |
81 | ||
1da177e4 LT |
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 */ | |
74bccc9b | 86 | unsigned in, out; /* i/o pipes */ |
739e0285 AC |
87 | struct tty_port port; /* our tty port data */ |
88 | struct urb *ctrlurb; /* urbs */ | |
61a87adf DK |
89 | u8 *ctrl_buffer; /* buffers of urbs */ |
90 | dma_addr_t ctrl_dma; /* dma handles of buffers */ | |
c4cabd28 ON |
91 | u8 *country_codes; /* country codes from device */ |
92 | unsigned int country_code_size; /* size of this buffer */ | |
93 | unsigned int country_rel_date; /* release date of version */ | |
86478944 | 94 | struct acm_wb wb[ACM_NW]; |
088c64f8 JH |
95 | unsigned long read_urbs_free; |
96 | struct urb *read_urbs[ACM_NR]; | |
97 | struct acm_rb read_buffers[ACM_NR]; | |
a81cf979 | 98 | struct acm_wb *putbuffer; /* for acm_tty_put_char() */ |
86478944 | 99 | int rx_buflimit; |
61a87adf | 100 | spinlock_t read_lock; |
884b600f | 101 | int write_used; /* number of non-empty write buffers */ |
11ea859d | 102 | int transmitting; |
884b600f | 103 | spinlock_t write_lock; |
1365baf7 | 104 | struct mutex mutex; |
7fb57a01 | 105 | bool disconnected; |
1aba579f LM |
106 | unsigned long flags; |
107 | # define EVENT_TTY_WAKEUP 0 | |
108 | # define EVENT_RX_STALL 1 | |
1da177e4 LT |
109 | struct usb_cdc_line_coding line; /* bits, stop, parity */ |
110 | struct work_struct work; /* work queue entry for line discipline waking up */ | |
1da177e4 LT |
111 | unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ |
112 | unsigned int ctrlout; /* output control lines (DTR, RTS) */ | |
5a6a62bd ON |
113 | struct async_icount iocount; /* counters for control line changes */ |
114 | struct async_icount oldcount; /* for comparison of counter */ | |
115 | wait_queue_head_t wioctl; /* for ioctl */ | |
1da177e4 LT |
116 | unsigned int writesize; /* max packet size for the output bulk endpoint */ |
117 | unsigned int readsize,ctrlsize; /* buffer sizes for freeing */ | |
1da177e4 | 118 | unsigned int minor; /* acm minor number */ |
1da177e4 | 119 | unsigned char clocal; /* termios CLOCAL */ |
1da177e4 | 120 | unsigned int ctrl_caps; /* control capabilities from the class specific header */ |
1365baf7 | 121 | unsigned int susp_count; /* number of suspended interfaces */ |
fa4dc364 | 122 | unsigned int combined_interfaces:1; /* control and data collapsed */ |
088c64f8 JH |
123 | unsigned int throttled:1; /* actually throttled */ |
124 | unsigned int throttle_req:1; /* throttle requested */ | |
cf7fdd57 | 125 | u8 bInterval; |
140cb81a | 126 | struct usb_anchor delayed; /* writes queued for a device about to be woken */ |
2a8cdfde | 127 | unsigned long quirks; |
1da177e4 LT |
128 | }; |
129 | ||
130 | #define CDC_DATA_INTERFACE_TYPE 0x0a | |
131 | ||
132 | /* constants describing various quirks and errors */ | |
d1b78100 ON |
133 | #define NO_UNION_NORMAL BIT(0) |
134 | #define SINGLE_RX_URB BIT(1) | |
135 | #define NO_CAP_LINE BIT(2) | |
d1b78100 ON |
136 | #define NO_DATA_INTERFACE BIT(4) |
137 | #define IGNORE_DEVICE BIT(5) | |
2a8cdfde | 138 | #define QUIRK_CONTROL_LINE_STATE BIT(6) |
15bf722e | 139 | #define CLEAR_HALT_CONDITIONS BIT(7) |
ffdb1e36 | 140 | #define SEND_ZERO_PACKET BIT(8) |