| 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 | |
| 65 | struct 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 | |
| 74 | struct acm_rb { |
| 75 | int size; |
| 76 | unsigned char *base; |
| 77 | dma_addr_t dma; |
| 78 | int index; |
| 79 | struct acm *instance; |
| 80 | }; |
| 81 | |
| 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 */ |
| 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 | spinlock_t read_lock; |
| 99 | int write_used; /* number of non-empty write buffers */ |
| 100 | int transmitting; |
| 101 | spinlock_t write_lock; |
| 102 | struct mutex mutex; |
| 103 | bool disconnected; |
| 104 | struct usb_cdc_line_coding line; /* bits, stop, parity */ |
| 105 | struct work_struct work; /* work queue entry for line discipline waking up */ |
| 106 | unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ |
| 107 | unsigned int ctrlout; /* output control lines (DTR, RTS) */ |
| 108 | unsigned int writesize; /* max packet size for the output bulk endpoint */ |
| 109 | unsigned int readsize,ctrlsize; /* buffer sizes for freeing */ |
| 110 | unsigned int minor; /* acm minor number */ |
| 111 | unsigned char clocal; /* termios CLOCAL */ |
| 112 | unsigned int ctrl_caps; /* control capabilities from the class specific header */ |
| 113 | unsigned int susp_count; /* number of suspended interfaces */ |
| 114 | unsigned int combined_interfaces:1; /* control and data collapsed */ |
| 115 | unsigned int is_int_ep:1; /* interrupt endpoints contrary to spec used */ |
| 116 | unsigned int throttled:1; /* actually throttled */ |
| 117 | unsigned int throttle_req:1; /* throttle requested */ |
| 118 | u8 bInterval; |
| 119 | struct usb_anchor delayed; /* writes queued for a device about to be woken */ |
| 120 | }; |
| 121 | |
| 122 | #define CDC_DATA_INTERFACE_TYPE 0x0a |
| 123 | |
| 124 | /* constants describing various quirks and errors */ |
| 125 | #define NO_UNION_NORMAL 1 |
| 126 | #define SINGLE_RX_URB 2 |
| 127 | #define NO_CAP_LINE 4 |
| 128 | #define NOT_A_MODEM 8 |
| 129 | #define NO_DATA_INTERFACE 16 |
| 130 | #define IGNORE_DEVICE 32 |