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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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507ca9bc04
This removes a lot of racy and buggy code by trying to check the status of the urb. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
336 lines
13 KiB
C
336 lines
13 KiB
C
/*
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* USB Serial Converter driver
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*
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* Copyright (C) 1999 - 2004
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* Greg Kroah-Hartman (greg@kroah.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this driver
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*
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* (03/26/2002) gkh
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* removed the port->tty check from port_paranoia_check() due to serial
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* consoles not having a tty device assigned to them.
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*
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* (12/03/2001) gkh
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* removed active from the port structure.
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* added documentation to the usb_serial_device_type structure
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*
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* (10/10/2001) gkh
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* added vendor and product to serial structure. Needed to determine device
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* owner when the device is disconnected.
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*
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* (05/30/2001) gkh
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* added sem to port structure and removed port_lock
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*
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* (10/05/2000) gkh
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* Added interrupt_in_endpointAddress and bulk_in_endpointAddress to help
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* fix bug with urb->dev not being set properly, now that the usb core
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* needs it.
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*
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* (09/11/2000) gkh
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* Added usb_serial_debug_data function to help get rid of #DEBUG in the
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* drivers.
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*
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* (08/28/2000) gkh
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* Added port_lock to port structure.
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*
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* (08/08/2000) gkh
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* Added open_count to port structure.
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*
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* (07/23/2000) gkh
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* Added bulk_out_endpointAddress to port structure.
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*
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* (07/19/2000) gkh, pberger, and borchers
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* Modifications to allow usb-serial drivers to be modules.
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*
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*
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*/
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#ifndef __LINUX_USB_SERIAL_H
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#define __LINUX_USB_SERIAL_H
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#include <linux/config.h>
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#include <linux/kref.h>
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#define SERIAL_TTY_MAJOR 188 /* Nice legal number now */
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#define SERIAL_TTY_MINORS 255 /* loads of devices :) */
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#define MAX_NUM_PORTS 8 /* The maximum number of ports one device can grab at once */
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/* parity check flag */
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#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
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/**
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* usb_serial_port: structure for the specific ports of a device.
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* @serial: pointer back to the struct usb_serial owner of this port.
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* @tty: pointer to the corresponding tty for this port.
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* @lock: spinlock to grab when updating portions of this structure.
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* @number: the number of the port (the minor number).
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* @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
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* @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
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* @interrupt_in_endpointAddress: endpoint address for the interrupt in pipe
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* for this port.
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* @interrupt_out_buffer: pointer to the interrupt out buffer for this port.
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* @interrupt_out_size: the size of the interrupt_out_buffer, in bytes.
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* @interrupt_out_urb: pointer to the interrupt out struct urb for this port.
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* @interrupt_out_endpointAddress: endpoint address for the interrupt out pipe
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* for this port.
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* @bulk_in_buffer: pointer to the bulk in buffer for this port.
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* @read_urb: pointer to the bulk in struct urb for this port.
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* @bulk_in_endpointAddress: endpoint address for the bulk in pipe for this
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* port.
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* @bulk_out_buffer: pointer to the bulk out buffer for this port.
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* @bulk_out_size: the size of the bulk_out_buffer, in bytes.
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* @write_urb: pointer to the bulk out struct urb for this port.
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* @bulk_out_endpointAddress: endpoint address for the bulk out pipe for this
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* port.
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* @write_wait: a wait_queue_head_t used by the port.
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* @work: work queue entry for the line discipline waking up.
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* @open_count: number of times this port has been opened.
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*
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* This structure is used by the usb-serial core and drivers for the specific
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* ports of a device.
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*/
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struct usb_serial_port {
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struct usb_serial * serial;
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struct tty_struct * tty;
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spinlock_t lock;
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unsigned char number;
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unsigned char * interrupt_in_buffer;
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struct urb * interrupt_in_urb;
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__u8 interrupt_in_endpointAddress;
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unsigned char * interrupt_out_buffer;
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int interrupt_out_size;
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struct urb * interrupt_out_urb;
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__u8 interrupt_out_endpointAddress;
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unsigned char * bulk_in_buffer;
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int bulk_in_size;
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struct urb * read_urb;
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__u8 bulk_in_endpointAddress;
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unsigned char * bulk_out_buffer;
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int bulk_out_size;
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struct urb * write_urb;
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int write_urb_busy;
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__u8 bulk_out_endpointAddress;
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wait_queue_head_t write_wait;
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struct work_struct work;
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int open_count;
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struct device dev;
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};
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#define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
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/* get and set the port private data pointer helper functions */
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static inline void *usb_get_serial_port_data (struct usb_serial_port *port)
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{
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return dev_get_drvdata(&port->dev);
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}
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static inline void usb_set_serial_port_data (struct usb_serial_port *port, void *data)
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{
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dev_set_drvdata(&port->dev, data);
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}
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/**
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* usb_serial - structure used by the usb-serial core for a device
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* @dev: pointer to the struct usb_device for this device
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* @type: pointer to the struct usb_serial_device_type for this device
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* @interface: pointer to the struct usb_interface for this device
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* @minor: the starting minor number for this device
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* @num_ports: the number of ports this device has
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* @num_interrupt_in: number of interrupt in endpoints we have
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* @num_interrupt_out: number of interrupt out endpoints we have
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* @num_bulk_in: number of bulk in endpoints we have
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* @num_bulk_out: number of bulk out endpoints we have
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* @port: array of struct usb_serial_port structures for the different ports.
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* @private: place to put any driver specific information that is needed. The
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* usb-serial driver is required to manage this data, the usb-serial core
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* will not touch this. Use usb_get_serial_data() and
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* usb_set_serial_data() to access this.
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*/
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struct usb_serial {
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struct usb_device * dev;
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struct usb_serial_device_type * type;
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struct usb_interface * interface;
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unsigned char minor;
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unsigned char num_ports;
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unsigned char num_port_pointers;
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char num_interrupt_in;
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char num_interrupt_out;
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char num_bulk_in;
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char num_bulk_out;
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struct usb_serial_port * port[MAX_NUM_PORTS];
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struct kref kref;
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void * private;
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};
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#define to_usb_serial(d) container_of(d, struct usb_serial, kref)
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#define NUM_DONT_CARE (-1)
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/* get and set the serial private data pointer helper functions */
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static inline void *usb_get_serial_data (struct usb_serial *serial)
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{
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return serial->private;
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}
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static inline void usb_set_serial_data (struct usb_serial *serial, void *data)
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{
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serial->private = data;
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}
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/**
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* usb_serial_device_type - a structure that defines a usb serial device
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* @owner: pointer to the module that owns this device.
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* @name: pointer to a string that describes this device. This string used
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* in the syslog messages when a device is inserted or removed.
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* @short_name: a pointer to a string that describes this device in
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* KOBJ_NAME_LEN characters or less. This is used for the sysfs interface
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* to describe the driver.
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* @id_table: pointer to a list of usb_device_id structures that define all
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* of the devices this structure can support.
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* @num_interrupt_in: the number of interrupt in endpoints this device will
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* have.
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* @num_interrupt_out: the number of interrupt out endpoints this device will
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* have.
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* @num_bulk_in: the number of bulk in endpoints this device will have.
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* @num_bulk_out: the number of bulk out endpoints this device will have.
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* @num_ports: the number of different ports this device will have.
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* @calc_num_ports: pointer to a function to determine how many ports this
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* device has dynamically. It will be called after the probe()
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* callback is called, but before attach()
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* @probe: pointer to the driver's probe function.
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* This will be called when the device is inserted into the system,
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* but before the device has been fully initialized by the usb_serial
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* subsystem. Use this function to download any firmware to the device,
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* or any other early initialization that might be needed.
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* Return 0 to continue on with the initialization sequence. Anything
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* else will abort it.
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* @attach: pointer to the driver's attach function.
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* This will be called when the struct usb_serial structure is fully set
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* set up. Do any local initialization of the device, or any private
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* memory structure allocation at this point in time.
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* @shutdown: pointer to the driver's shutdown function. This will be
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* called when the device is removed from the system.
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*
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* This structure is defines a USB Serial device. It provides all of
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* the information that the USB serial core code needs. If the function
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* pointers are defined, then the USB serial core code will call them when
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* the corresponding tty port functions are called. If they are not
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* called, the generic serial function will be used instead.
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*/
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struct usb_serial_device_type {
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struct module *owner;
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char *name;
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char *short_name;
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const struct usb_device_id *id_table;
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char num_interrupt_in;
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char num_interrupt_out;
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char num_bulk_in;
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char num_bulk_out;
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char num_ports;
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struct list_head driver_list;
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struct device_driver driver;
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int (*probe) (struct usb_serial *serial, const struct usb_device_id *id);
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int (*attach) (struct usb_serial *serial);
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int (*calc_num_ports) (struct usb_serial *serial);
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void (*shutdown) (struct usb_serial *serial);
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int (*port_probe) (struct usb_serial_port *port);
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int (*port_remove) (struct usb_serial_port *port);
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/* serial function calls */
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int (*open) (struct usb_serial_port *port, struct file * filp);
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void (*close) (struct usb_serial_port *port, struct file * filp);
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int (*write) (struct usb_serial_port *port, const unsigned char *buf, int count);
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int (*write_room) (struct usb_serial_port *port);
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int (*ioctl) (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
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void (*set_termios) (struct usb_serial_port *port, struct termios * old);
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void (*break_ctl) (struct usb_serial_port *port, int break_state);
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int (*chars_in_buffer) (struct usb_serial_port *port);
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void (*throttle) (struct usb_serial_port *port);
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void (*unthrottle) (struct usb_serial_port *port);
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int (*tiocmget) (struct usb_serial_port *port, struct file *file);
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int (*tiocmset) (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
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void (*read_int_callback)(struct urb *urb, struct pt_regs *regs);
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void (*write_int_callback)(struct urb *urb, struct pt_regs *regs);
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void (*read_bulk_callback)(struct urb *urb, struct pt_regs *regs);
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void (*write_bulk_callback)(struct urb *urb, struct pt_regs *regs);
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};
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#define to_usb_serial_driver(d) container_of(d, struct usb_serial_device_type, driver)
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extern int usb_serial_register(struct usb_serial_device_type *new_device);
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extern void usb_serial_deregister(struct usb_serial_device_type *device);
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extern void usb_serial_port_softint(void *private);
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extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
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extern void usb_serial_disconnect(struct usb_interface *iface);
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extern int ezusb_writememory (struct usb_serial *serial, int address, unsigned char *data, int length, __u8 bRequest);
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extern int ezusb_set_reset (struct usb_serial *serial, unsigned char reset_bit);
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/* USB Serial console functions */
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#ifdef CONFIG_USB_SERIAL_CONSOLE
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extern void usb_serial_console_init (int debug, int minor);
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extern void usb_serial_console_exit (void);
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#else
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static inline void usb_serial_console_init (int debug, int minor) { }
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static inline void usb_serial_console_exit (void) { }
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#endif
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/* Functions needed by other parts of the usbserial core */
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extern struct usb_serial *usb_serial_get_by_index (unsigned int minor);
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extern int usb_serial_generic_open (struct usb_serial_port *port, struct file *filp);
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extern int usb_serial_generic_write (struct usb_serial_port *port, const unsigned char *buf, int count);
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extern void usb_serial_generic_close (struct usb_serial_port *port, struct file *filp);
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extern int usb_serial_generic_write_room (struct usb_serial_port *port);
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extern int usb_serial_generic_chars_in_buffer (struct usb_serial_port *port);
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extern void usb_serial_generic_read_bulk_callback (struct urb *urb, struct pt_regs *regs);
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extern void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *regs);
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extern void usb_serial_generic_shutdown (struct usb_serial *serial);
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extern int usb_serial_generic_register (int debug);
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extern void usb_serial_generic_deregister (void);
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extern int usb_serial_bus_register (struct usb_serial_device_type *device);
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extern void usb_serial_bus_deregister (struct usb_serial_device_type *device);
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extern struct usb_serial_device_type usb_serial_generic_device;
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extern struct bus_type usb_serial_bus_type;
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extern struct tty_driver *usb_serial_tty_driver;
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static inline void usb_serial_debug_data(int debug,
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struct device *dev,
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const char *function, int size,
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const unsigned char *data)
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{
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int i;
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if (debug) {
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dev_printk(KERN_DEBUG, dev, "%s - length = %d, data = ", function, size);
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for (i = 0; i < size; ++i)
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printk ("%.2x ", data[i]);
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printk ("\n");
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}
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}
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/* Use our own dbg macro */
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#undef dbg
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#define dbg(format, arg...) do { if (debug) printk(KERN_DEBUG "%s: " format "\n" , __FILE__ , ## arg); } while (0)
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#endif /* ifdef __LINUX_USB_SERIAL_H */
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