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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 *
4 * Includes for cdc-acm.c
5 *
6 * Mainly take from usbnet's cdc-ether part
7 *
8 */
9
10/*
11 * Major and minor numbers.
12 */
13
14#define ACM_TTY_MAJOR 166
15#define ACM_TTY_MINORS 256
16
17#define ACM_MINOR_INVALID ACM_TTY_MINORS
18
19/*
20 * Requests.
21 */
22
23#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
24
25/*
26 * Internal driver structures.
27 */
28
29/*
30 * The only reason to have several buffers is to accommodate assumptions
31 * in line disciplines. They ask for empty space amount, receive our URB size,
32 * and proceed to issue several 1-character writes, assuming they will fit.
33 * The very first write takes a complete URB. Fortunately, this only happens
34 * when processing onlcr, so we only need 2 buffers. These values must be
35 * powers of 2.
36 */
37#define ACM_NW 16
38#define ACM_NR 16
39
40struct acm_wb {
41 u8 *buf;
42 dma_addr_t dmah;
43 unsigned int len;
44 struct urb *urb;
45 struct acm *instance;
46 bool use;
47};
48
49struct acm_rb {
50 int size;
51 unsigned char *base;
52 dma_addr_t dma;
53 int index;
54 struct acm *instance;
55};
56
57struct acm {
58 struct usb_device *dev; /* the corresponding usb device */
59 struct usb_interface *control; /* control interface */
60 struct usb_interface *data; /* data interface */
61 unsigned in, out; /* i/o pipes */
62 struct tty_port port; /* our tty port data */
63 struct urb *ctrlurb; /* urbs */
64 u8 *ctrl_buffer; /* buffers of urbs */
65 dma_addr_t ctrl_dma; /* dma handles of buffers */
66 u8 *country_codes; /* country codes from device */
67 unsigned int country_code_size; /* size of this buffer */
68 unsigned int country_rel_date; /* release date of version */
69 struct acm_wb wb[ACM_NW];
70 unsigned long read_urbs_free;
71 struct urb *read_urbs[ACM_NR];
72 struct acm_rb read_buffers[ACM_NR];
73 int rx_buflimit;
74 spinlock_t read_lock;
75 u8 *notification_buffer; /* to reassemble fragmented notifications */
76 unsigned int nb_index;
77 unsigned int nb_size;
78 int transmitting;
79 spinlock_t write_lock;
80 struct mutex mutex;
81 bool disconnected;
82 unsigned long flags;
83# define EVENT_TTY_WAKEUP 0
84# define EVENT_RX_STALL 1
85# define ACM_THROTTLED 2
86# define ACM_ERROR_DELAY 3
87 unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */
88 struct usb_cdc_line_coding line; /* bits, stop, parity */
89 struct delayed_work dwork; /* work queue entry for various purposes */
90 unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
91 unsigned int ctrlout; /* output control lines (DTR, RTS) */
92 struct async_icount iocount; /* counters for control line changes */
93 struct async_icount oldcount; /* for comparison of counter */
94 wait_queue_head_t wioctl; /* for ioctl */
95 unsigned int writesize; /* max packet size for the output bulk endpoint */
96 unsigned int readsize,ctrlsize; /* buffer sizes for freeing */
97 unsigned int minor; /* acm minor number */
98 unsigned char clocal; /* termios CLOCAL */
99 unsigned int ctrl_caps; /* control capabilities from the class specific header */
100 unsigned int susp_count; /* number of suspended interfaces */
101 unsigned int combined_interfaces:1; /* control and data collapsed */
102 u8 bInterval;
103 struct usb_anchor delayed; /* writes queued for a device about to be woken */
104 unsigned long quirks;
105};
106
107/* constants describing various quirks and errors */
108#define NO_UNION_NORMAL BIT(0)
109#define SINGLE_RX_URB BIT(1)
110#define NO_CAP_LINE BIT(2)
111#define IGNORE_DEVICE BIT(3)
112#define QUIRK_CONTROL_LINE_STATE BIT(4)
113#define CLEAR_HALT_CONDITIONS BIT(5)
114#define SEND_ZERO_PACKET BIT(6)
115#define DISABLE_ECHO BIT(7)
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
65struct 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
74struct acm_rb {
75 int size;
76 unsigned char *base;
77 dma_addr_t dma;
78 int index;
79 struct acm *instance;
80};
81
82struct 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 struct async_icount iocount; /* counters for control line changes */
110 struct async_icount oldcount; /* for comparison of counter */
111 wait_queue_head_t wioctl; /* for ioctl */
112 unsigned int writesize; /* max packet size for the output bulk endpoint */
113 unsigned int readsize,ctrlsize; /* buffer sizes for freeing */
114 unsigned int minor; /* acm minor number */
115 unsigned char clocal; /* termios CLOCAL */
116 unsigned int ctrl_caps; /* control capabilities from the class specific header */
117 unsigned int susp_count; /* number of suspended interfaces */
118 unsigned int combined_interfaces:1; /* control and data collapsed */
119 unsigned int is_int_ep:1; /* interrupt endpoints contrary to spec used */
120 unsigned int throttled:1; /* actually throttled */
121 unsigned int throttle_req:1; /* throttle requested */
122 u8 bInterval;
123 struct acm_wb *delayed_wb; /* write queued for a device about to be woken */
124};
125
126#define CDC_DATA_INTERFACE_TYPE 0x0a
127
128/* constants describing various quirks and errors */
129#define NO_UNION_NORMAL 1
130#define SINGLE_RX_URB 2
131#define NO_CAP_LINE 4
132#define NOT_A_MODEM 8
133#define NO_DATA_INTERFACE 16
134#define IGNORE_DEVICE 32