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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/* 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 * CMSPAR, some architectures can't have space and mark parity.
12 */
13
14#ifndef CMSPAR
15#define CMSPAR 0
16#endif
17
18/*
19 * Major and minor numbers.
20 */
21
22#define ACM_TTY_MAJOR 166
23#define ACM_TTY_MINORS 256
24
25#define ACM_MINOR_INVALID ACM_TTY_MINORS
26
27/*
28 * Requests.
29 */
30
31#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE)
32
33/*
34 * Output control lines.
35 */
36
37#define ACM_CTRL_DTR 0x01
38#define ACM_CTRL_RTS 0x02
39
40/*
41 * Input control lines and line errors.
42 */
43
44#define ACM_CTRL_DCD 0x01
45#define ACM_CTRL_DSR 0x02
46#define ACM_CTRL_BRK 0x04
47#define ACM_CTRL_RI 0x08
48
49#define ACM_CTRL_FRAMING 0x10
50#define ACM_CTRL_PARITY 0x20
51#define ACM_CTRL_OVERRUN 0x40
52
53/*
54 * Internal driver structures.
55 */
56
57/*
58 * The only reason to have several buffers is to accommodate assumptions
59 * in line disciplines. They ask for empty space amount, receive our URB size,
60 * and proceed to issue several 1-character writes, assuming they will fit.
61 * The very first write takes a complete URB. Fortunately, this only happens
62 * when processing onlcr, so we only need 2 buffers. These values must be
63 * powers of 2.
64 */
65#define ACM_NW 16
66#define ACM_NR 16
67
68struct acm_wb {
69 u8 *buf;
70 dma_addr_t dmah;
71 unsigned int len;
72 struct urb *urb;
73 struct acm *instance;
74 bool use;
75};
76
77struct acm_rb {
78 int size;
79 unsigned char *base;
80 dma_addr_t dma;
81 int index;
82 struct acm *instance;
83};
84
85struct acm {
86 struct usb_device *dev; /* the corresponding usb device */
87 struct usb_interface *control; /* control interface */
88 struct usb_interface *data; /* data interface */
89 unsigned in, out; /* i/o pipes */
90 struct tty_port port; /* our tty port data */
91 struct urb *ctrlurb; /* urbs */
92 u8 *ctrl_buffer; /* buffers of urbs */
93 dma_addr_t ctrl_dma; /* dma handles of buffers */
94 u8 *country_codes; /* country codes from device */
95 unsigned int country_code_size; /* size of this buffer */
96 unsigned int country_rel_date; /* release date of version */
97 struct acm_wb wb[ACM_NW];
98 unsigned long read_urbs_free;
99 struct urb *read_urbs[ACM_NR];
100 struct acm_rb read_buffers[ACM_NR];
101 int rx_buflimit;
102 spinlock_t read_lock;
103 u8 *notification_buffer; /* to reassemble fragmented notifications */
104 unsigned int nb_index;
105 unsigned int nb_size;
106 int transmitting;
107 spinlock_t write_lock;
108 struct mutex mutex;
109 bool disconnected;
110 unsigned long flags;
111# define EVENT_TTY_WAKEUP 0
112# define EVENT_RX_STALL 1
113# define ACM_THROTTLED 2
114# define ACM_ERROR_DELAY 3
115 unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */
116 struct usb_cdc_line_coding line; /* bits, stop, parity */
117 struct delayed_work dwork; /* work queue entry for various purposes */
118 unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */
119 unsigned int ctrlout; /* output control lines (DTR, RTS) */
120 struct async_icount iocount; /* counters for control line changes */
121 struct async_icount oldcount; /* for comparison of counter */
122 wait_queue_head_t wioctl; /* for ioctl */
123 unsigned int writesize; /* max packet size for the output bulk endpoint */
124 unsigned int readsize,ctrlsize; /* buffer sizes for freeing */
125 unsigned int minor; /* acm minor number */
126 unsigned char clocal; /* termios CLOCAL */
127 unsigned int ctrl_caps; /* control capabilities from the class specific header */
128 unsigned int susp_count; /* number of suspended interfaces */
129 unsigned int combined_interfaces:1; /* control and data collapsed */
130 u8 bInterval;
131 struct usb_anchor delayed; /* writes queued for a device about to be woken */
132 unsigned long quirks;
133};
134
135/* constants describing various quirks and errors */
136#define NO_UNION_NORMAL BIT(0)
137#define SINGLE_RX_URB BIT(1)
138#define NO_CAP_LINE BIT(2)
139#define IGNORE_DEVICE BIT(3)
140#define QUIRK_CONTROL_LINE_STATE BIT(4)
141#define CLEAR_HALT_CONDITIONS BIT(5)
142#define SEND_ZERO_PACKET BIT(6)
143#define DISABLE_ECHO BIT(7)