blob: 1bcaea32cfc19dc70550a70a8c365c4af2d29c38 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Oliver Neukum884b6002005-04-21 21:28:02 +020054/*
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
Oliver Neukum86478942006-05-13 22:50:47 +020059 * when processing onlcr, so we only need 2 buffers. These values must be
60 * powers of 2.
Oliver Neukum884b6002005-04-21 21:28:02 +020061 */
Oliver Neukum86478942006-05-13 22:50:47 +020062#define ACM_NW 2
63#define ACM_NR 16
David Kubicek61a87ad2005-11-01 18:51:34 +010064
Oliver Neukum884b6002005-04-21 21:28:02 +020065struct acm_wb {
66 unsigned char *buf;
67 dma_addr_t dmah;
68 int len;
69 int use;
70};
71
David Kubicek61a87ad2005-11-01 18:51:34 +010072struct acm_rb {
73 struct list_head list;
74 int size;
75 unsigned char *base;
76 dma_addr_t dma;
77};
78
79struct acm_ru {
80 struct list_head list;
81 struct acm_rb *buffer;
82 struct urb *urb;
83 struct acm *instance;
84};
85
Linus Torvalds1da177e2005-04-16 15:20:36 -070086struct 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 */
David Kubicek61a87ad2005-11-01 18:51:34 +010091 struct urb *ctrlurb, *writeurb; /* urbs */
92 u8 *ctrl_buffer; /* buffers of urbs */
93 dma_addr_t ctrl_dma; /* dma handles of buffers */
Oliver Neukum86478942006-05-13 22:50:47 +020094 struct acm_wb wb[ACM_NW];
95 struct acm_ru ru[ACM_NR];
96 struct acm_rb rb[ACM_NR];
97 int rx_buflimit;
David Kubicek61a87ad2005-11-01 18:51:34 +010098 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;
Oliver Neukum884b6002005-04-21 21:28:02 +0200103 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 struct usb_cdc_line_coding line; /* bits, stop, parity */
108 struct work_struct work; /* work queue entry for line discipline waking up */
David Kubicek61a87ad2005-11-01 18:51:34 +0100109 struct tasklet_struct urb_task; /* rx processing */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 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
Oliver Neukum86478942006-05-13 22:50:47 +0200126#define SINGLE_RX_URB 2