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141 lines
3.9 KiB
141 lines
3.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* |
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* Includes for cdc-acm.c |
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* |
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* Mainly take from usbnet's cdc-ether part |
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* |
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*/ |
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/* |
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* CMSPAR, some architectures can't have space and mark parity. |
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*/ |
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#ifndef CMSPAR |
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#define CMSPAR 0 |
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#endif |
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/* |
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* Major and minor numbers. |
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*/ |
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#define ACM_TTY_MAJOR 166 |
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#define ACM_TTY_MINORS 256 |
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/* |
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* Requests. |
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*/ |
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#define USB_RT_ACM (USB_TYPE_CLASS | USB_RECIP_INTERFACE) |
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/* |
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* Output control lines. |
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*/ |
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#define ACM_CTRL_DTR 0x01 |
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#define ACM_CTRL_RTS 0x02 |
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/* |
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* Input control lines and line errors. |
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*/ |
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#define ACM_CTRL_DCD 0x01 |
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#define ACM_CTRL_DSR 0x02 |
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#define ACM_CTRL_BRK 0x04 |
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#define ACM_CTRL_RI 0x08 |
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#define ACM_CTRL_FRAMING 0x10 |
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#define ACM_CTRL_PARITY 0x20 |
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#define ACM_CTRL_OVERRUN 0x40 |
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/* |
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* Internal driver structures. |
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*/ |
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/* |
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* The only reason to have several buffers is to accommodate assumptions |
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* in line disciplines. They ask for empty space amount, receive our URB size, |
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* and proceed to issue several 1-character writes, assuming they will fit. |
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* The very first write takes a complete URB. Fortunately, this only happens |
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* when processing onlcr, so we only need 2 buffers. These values must be |
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* powers of 2. |
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*/ |
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#define ACM_NW 16 |
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#define ACM_NR 16 |
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struct acm_wb { |
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u8 *buf; |
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dma_addr_t dmah; |
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unsigned int len; |
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struct urb *urb; |
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struct acm *instance; |
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bool use; |
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}; |
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struct acm_rb { |
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int size; |
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unsigned char *base; |
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dma_addr_t dma; |
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int index; |
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struct acm *instance; |
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}; |
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struct acm { |
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struct usb_device *dev; /* the corresponding usb device */ |
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struct usb_interface *control; /* control interface */ |
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struct usb_interface *data; /* data interface */ |
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unsigned in, out; /* i/o pipes */ |
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struct tty_port port; /* our tty port data */ |
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struct urb *ctrlurb; /* urbs */ |
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u8 *ctrl_buffer; /* buffers of urbs */ |
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dma_addr_t ctrl_dma; /* dma handles of buffers */ |
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u8 *country_codes; /* country codes from device */ |
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unsigned int country_code_size; /* size of this buffer */ |
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unsigned int country_rel_date; /* release date of version */ |
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struct acm_wb wb[ACM_NW]; |
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unsigned long read_urbs_free; |
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struct urb *read_urbs[ACM_NR]; |
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struct acm_rb read_buffers[ACM_NR]; |
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int rx_buflimit; |
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spinlock_t read_lock; |
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u8 *notification_buffer; /* to reassemble fragmented notifications */ |
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unsigned int nb_index; |
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unsigned int nb_size; |
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int transmitting; |
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spinlock_t write_lock; |
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struct mutex mutex; |
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bool disconnected; |
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unsigned long flags; |
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# define EVENT_TTY_WAKEUP 0 |
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# define EVENT_RX_STALL 1 |
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# define ACM_THROTTLED 2 |
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# define ACM_ERROR_DELAY 3 |
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unsigned long urbs_in_error_delay; /* these need to be restarted after a delay */ |
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struct usb_cdc_line_coding line; /* bits, stop, parity */ |
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struct delayed_work dwork; /* work queue entry for various purposes */ |
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unsigned int ctrlin; /* input control lines (DCD, DSR, RI, break, overruns) */ |
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unsigned int ctrlout; /* output control lines (DTR, RTS) */ |
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struct async_icount iocount; /* counters for control line changes */ |
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struct async_icount oldcount; /* for comparison of counter */ |
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wait_queue_head_t wioctl; /* for ioctl */ |
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unsigned int writesize; /* max packet size for the output bulk endpoint */ |
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unsigned int readsize,ctrlsize; /* buffer sizes for freeing */ |
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unsigned int minor; /* acm minor number */ |
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unsigned char clocal; /* termios CLOCAL */ |
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unsigned int ctrl_caps; /* control capabilities from the class specific header */ |
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unsigned int susp_count; /* number of suspended interfaces */ |
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unsigned int combined_interfaces:1; /* control and data collapsed */ |
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u8 bInterval; |
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struct usb_anchor delayed; /* writes queued for a device about to be woken */ |
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unsigned long quirks; |
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}; |
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/* constants describing various quirks and errors */ |
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#define NO_UNION_NORMAL BIT(0) |
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#define SINGLE_RX_URB BIT(1) |
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#define NO_CAP_LINE BIT(2) |
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#define IGNORE_DEVICE BIT(3) |
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#define QUIRK_CONTROL_LINE_STATE BIT(4) |
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#define CLEAR_HALT_CONDITIONS BIT(5) |
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#define SEND_ZERO_PACKET BIT(6) |
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#define DISABLE_ECHO BIT(7)
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