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Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | |
65c35dd5 | 23 | #define ACM_TTY_MINORS 256 |
1da177e4 LT |
24 | |
25 | /* | |
26 | * Requests. | |
27 | */ | |
28 | ||
29 | #define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE) | |
30 | ||
31 | /* | |
32 | * Output control lines. | |
33 | */ | |
34 | ||
35 | #define ACM_CTRL_DTR 0x01 | |
36 | #define ACM_CTRL_RTS 0x02 | |
37 | ||
38 | /* | |
39 | * Input control lines and line errors. | |
40 | */ | |
41 | ||
42 | #define ACM_CTRL_DCD 0x01 | |
43 | #define ACM_CTRL_DSR 0x02 | |
44 | #define ACM_CTRL_BRK 0x04 | |
45 | #define ACM_CTRL_RI 0x08 | |
46 | ||
47 | #define ACM_CTRL_FRAMING 0x10 | |
48 | #define ACM_CTRL_PARITY 0x20 | |
49 | #define ACM_CTRL_OVERRUN 0x40 | |
50 | ||
51 | /* | |
52 | * Internal driver structures. | |
53 | */ | |
54 | ||
884b600f | 55 | /* |
25985edc | 56 | * The only reason to have several buffers is to accommodate assumptions |
884b600f ON |
57 | * in line disciplines. They ask for empty space amount, receive our URB size, |
58 | * and proceed to issue several 1-character writes, assuming they will fit. | |
59 | * The very first write takes a complete URB. Fortunately, this only happens | |
86478944 ON |
60 | * when processing onlcr, so we only need 2 buffers. These values must be |
61 | * powers of 2. | |
884b600f | 62 | */ |
e4cf3aa8 | 63 | #define ACM_NW 16 |
86478944 | 64 | #define ACM_NR 16 |
61a87adf | 65 | |
884b600f ON |
66 | struct acm_wb { |
67 | unsigned char *buf; | |
68 | dma_addr_t dmah; | |
69 | int len; | |
70 | int use; | |
e4cf3aa8 DE |
71 | struct urb *urb; |
72 | struct acm *instance; | |
884b600f ON |
73 | }; |
74 | ||
61a87adf | 75 | struct acm_rb { |
61a87adf DK |
76 | int size; |
77 | unsigned char *base; | |
78 | dma_addr_t dma; | |
088c64f8 | 79 | int index; |
61a87adf DK |
80 | struct acm *instance; |
81 | }; | |
82 | ||
1da177e4 LT |
83 | struct acm { |
84 | struct usb_device *dev; /* the corresponding usb device */ | |
85 | struct usb_interface *control; /* control interface */ | |
86 | struct usb_interface *data; /* data interface */ | |
74bccc9b | 87 | unsigned in, out; /* i/o pipes */ |
739e0285 AC |
88 | struct tty_port port; /* our tty port data */ |
89 | struct urb *ctrlurb; /* urbs */ | |
61a87adf DK |
90 | u8 *ctrl_buffer; /* buffers of urbs */ |
91 | dma_addr_t ctrl_dma; /* dma handles of buffers */ | |
c4cabd28 ON |
92 | u8 *country_codes; /* country codes from device */ |
93 | unsigned int country_code_size; /* size of this buffer */ | |
94 | unsigned int country_rel_date; /* release date of version */ | |
86478944 | 95 | struct acm_wb wb[ACM_NW]; |
088c64f8 JH |
96 | unsigned long read_urbs_free; |
97 | struct urb *read_urbs[ACM_NR]; | |
98 | struct acm_rb read_buffers[ACM_NR]; | |
86478944 | 99 | int rx_buflimit; |
61a87adf | 100 | spinlock_t read_lock; |
ea258352 TH |
101 | u8 *notification_buffer; /* to reassemble fragmented notifications */ |
102 | unsigned int nb_index; | |
103 | unsigned int nb_size; | |
11ea859d | 104 | int transmitting; |
884b600f | 105 | spinlock_t write_lock; |
1365baf7 | 106 | struct mutex mutex; |
7fb57a01 | 107 | bool disconnected; |
1aba579f LM |
108 | unsigned long flags; |
109 | # define EVENT_TTY_WAKEUP 0 | |
110 | # define EVENT_RX_STALL 1 | |
0f02321e | 111 | # define ACM_THROTTLED 2 |
a4e7279c ON |
112 | # define ACM_ERROR_DELAY 3 |
113 | unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */ | |
1da177e4 | 114 | struct usb_cdc_line_coding line; /* bits, stop, parity */ |
a4e7279c ON |
115 | struct work_struct work; /* work queue entry for various purposes*/ |
116 | struct delayed_work dwork; /* for cool downs needed in error recovery */ | |
1da177e4 LT |
117 | unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ |
118 | unsigned int ctrlout; /* output control lines (DTR, RTS) */ | |
5a6a62bd ON |
119 | struct async_icount iocount; /* counters for control line changes */ |
120 | struct async_icount oldcount; /* for comparison of counter */ | |
121 | wait_queue_head_t wioctl; /* for ioctl */ | |
1da177e4 LT |
122 | unsigned int writesize; /* max packet size for the output bulk endpoint */ |
123 | unsigned int readsize,ctrlsize; /* buffer sizes for freeing */ | |
1da177e4 | 124 | unsigned int minor; /* acm minor number */ |
1da177e4 | 125 | unsigned char clocal; /* termios CLOCAL */ |
1da177e4 | 126 | unsigned int ctrl_caps; /* control capabilities from the class specific header */ |
1365baf7 | 127 | unsigned int susp_count; /* number of suspended interfaces */ |
fa4dc364 | 128 | unsigned int combined_interfaces:1; /* control and data collapsed */ |
cf7fdd57 | 129 | u8 bInterval; |
140cb81a | 130 | struct usb_anchor delayed; /* writes queued for a device about to be woken */ |
2a8cdfde | 131 | unsigned long quirks; |
1da177e4 LT |
132 | }; |
133 | ||
134 | #define CDC_DATA_INTERFACE_TYPE 0x0a | |
135 | ||
136 | /* constants describing various quirks and errors */ | |
d1b78100 ON |
137 | #define NO_UNION_NORMAL BIT(0) |
138 | #define SINGLE_RX_URB BIT(1) | |
139 | #define NO_CAP_LINE BIT(2) | |
d1b78100 ON |
140 | #define NO_DATA_INTERFACE BIT(4) |
141 | #define IGNORE_DEVICE BIT(5) | |
2a8cdfde | 142 | #define QUIRK_CONTROL_LINE_STATE BIT(6) |
15bf722e | 143 | #define CLEAR_HALT_CONDITIONS BIT(7) |
ffdb1e36 | 144 | #define SEND_ZERO_PACKET BIT(8) |
eafb27fa | 145 | #define DISABLE_ECHO BIT(9) |