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![Paul Gortmaker](/assets/img/avatar_default.png)
None of these files are actually using any __init type directives and hence don't need to include <linux/init.h>. Most are just a left over from __devinit and __cpuinit removal, or simply due to code getting copied from one driver to the next. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
847 lines
24 KiB
C
847 lines
24 KiB
C
/*
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* Ours Technology Inc. OTi-6858 USB to serial adapter driver.
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*
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* Copyleft (C) 2007 Kees Lemmens (adapted for kernel 2.6.20)
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* Copyright (C) 2006 Tomasz Michal Lukaszewski (FIXME: add e-mail)
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* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2003 IBM Corp.
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*
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* Many thanks to the authors of pl2303 driver: all functions in this file
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* are heavily based on pl2303 code, buffering code is a 1-to-1 copy.
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*
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* Warning! You use this driver on your own risk! The only official
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* description of this device I have is datasheet from manufacturer,
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* and it doesn't contain almost any information needed to write a driver.
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* Almost all knowlegde used while writing this driver was gathered by:
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* - analyzing traffic between device and the M$ Windows 2000 driver,
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* - trying different bit combinations and checking pin states
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* with a voltmeter,
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* - receiving malformed frames and producing buffer overflows
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* to learn how errors are reported,
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* So, THIS CODE CAN DESTROY OTi-6858 AND ANY OTHER DEVICES, THAT ARE
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* CONNECTED TO IT!
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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.
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*
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* See Documentation/usb/usb-serial.txt for more information on using this
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* driver
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*
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* TODO:
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* - implement correct flushing for ioctls and oti6858_close()
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* - check how errors (rx overflow, parity error, framing error) are reported
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* - implement oti6858_break_ctl()
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* - implement more ioctls
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* - test/implement flow control
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* - allow setting custom baud rates
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/spinlock.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/uaccess.h>
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#include <linux/kfifo.h>
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#include "oti6858.h"
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#define OTI6858_DESCRIPTION \
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"Ours Technology Inc. OTi-6858 USB to serial adapter driver"
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#define OTI6858_AUTHOR "Tomasz Michal Lukaszewski <FIXME@FIXME>"
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static const struct usb_device_id id_table[] = {
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{ USB_DEVICE(OTI6858_VENDOR_ID, OTI6858_PRODUCT_ID) },
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{ }
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};
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MODULE_DEVICE_TABLE(usb, id_table);
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/* requests */
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#define OTI6858_REQ_GET_STATUS (USB_DIR_IN | USB_TYPE_VENDOR | 0x00)
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#define OTI6858_REQ_T_GET_STATUS 0x01
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#define OTI6858_REQ_SET_LINE (USB_DIR_OUT | USB_TYPE_VENDOR | 0x00)
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#define OTI6858_REQ_T_SET_LINE 0x00
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#define OTI6858_REQ_CHECK_TXBUFF (USB_DIR_IN | USB_TYPE_VENDOR | 0x01)
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#define OTI6858_REQ_T_CHECK_TXBUFF 0x00
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/* format of the control packet */
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struct oti6858_control_pkt {
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__le16 divisor; /* baud rate = 96000000 / (16 * divisor), LE */
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#define OTI6858_MAX_BAUD_RATE 3000000
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u8 frame_fmt;
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#define FMT_STOP_BITS_MASK 0xc0
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#define FMT_STOP_BITS_1 0x00
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#define FMT_STOP_BITS_2 0x40 /* 1.5 stop bits if FMT_DATA_BITS_5 */
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#define FMT_PARITY_MASK 0x38
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#define FMT_PARITY_NONE 0x00
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#define FMT_PARITY_ODD 0x08
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#define FMT_PARITY_EVEN 0x18
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#define FMT_PARITY_MARK 0x28
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#define FMT_PARITY_SPACE 0x38
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#define FMT_DATA_BITS_MASK 0x03
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#define FMT_DATA_BITS_5 0x00
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#define FMT_DATA_BITS_6 0x01
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#define FMT_DATA_BITS_7 0x02
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#define FMT_DATA_BITS_8 0x03
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u8 something; /* always equals 0x43 */
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u8 control; /* settings of flow control lines */
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#define CONTROL_MASK 0x0c
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#define CONTROL_DTR_HIGH 0x08
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#define CONTROL_RTS_HIGH 0x04
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u8 tx_status;
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#define TX_BUFFER_EMPTIED 0x09
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u8 pin_state;
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#define PIN_MASK 0x3f
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#define PIN_MSR_MASK 0x1b
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#define PIN_RTS 0x20 /* output pin */
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#define PIN_CTS 0x10 /* input pin, active low */
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#define PIN_DSR 0x08 /* input pin, active low */
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#define PIN_DTR 0x04 /* output pin */
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#define PIN_RI 0x02 /* input pin, active low */
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#define PIN_DCD 0x01 /* input pin, active low */
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u8 rx_bytes_avail; /* number of bytes in rx buffer */;
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};
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#define OTI6858_CTRL_PKT_SIZE sizeof(struct oti6858_control_pkt)
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#define OTI6858_CTRL_EQUALS_PENDING(a, priv) \
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(((a)->divisor == (priv)->pending_setup.divisor) \
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&& ((a)->control == (priv)->pending_setup.control) \
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&& ((a)->frame_fmt == (priv)->pending_setup.frame_fmt))
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/* function prototypes */
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static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port);
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static void oti6858_close(struct usb_serial_port *port);
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static void oti6858_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port, struct ktermios *old);
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static void oti6858_init_termios(struct tty_struct *tty);
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static void oti6858_read_int_callback(struct urb *urb);
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static void oti6858_read_bulk_callback(struct urb *urb);
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static void oti6858_write_bulk_callback(struct urb *urb);
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static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count);
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static int oti6858_write_room(struct tty_struct *tty);
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static int oti6858_chars_in_buffer(struct tty_struct *tty);
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static int oti6858_tiocmget(struct tty_struct *tty);
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static int oti6858_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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static int oti6858_port_probe(struct usb_serial_port *port);
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static int oti6858_port_remove(struct usb_serial_port *port);
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/* device info */
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static struct usb_serial_driver oti6858_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "oti6858",
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},
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.id_table = id_table,
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.num_ports = 1,
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.open = oti6858_open,
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.close = oti6858_close,
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.write = oti6858_write,
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.set_termios = oti6858_set_termios,
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.init_termios = oti6858_init_termios,
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.tiocmget = oti6858_tiocmget,
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.tiocmset = oti6858_tiocmset,
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.tiocmiwait = usb_serial_generic_tiocmiwait,
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.read_bulk_callback = oti6858_read_bulk_callback,
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.read_int_callback = oti6858_read_int_callback,
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.write_bulk_callback = oti6858_write_bulk_callback,
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.write_room = oti6858_write_room,
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.chars_in_buffer = oti6858_chars_in_buffer,
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.port_probe = oti6858_port_probe,
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.port_remove = oti6858_port_remove,
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};
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static struct usb_serial_driver * const serial_drivers[] = {
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&oti6858_device, NULL
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};
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struct oti6858_private {
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spinlock_t lock;
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struct oti6858_control_pkt status;
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struct {
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u8 read_urb_in_use;
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u8 write_urb_in_use;
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} flags;
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struct delayed_work delayed_write_work;
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struct {
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__le16 divisor;
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u8 frame_fmt;
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u8 control;
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} pending_setup;
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u8 transient;
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u8 setup_done;
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struct delayed_work delayed_setup_work;
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struct usb_serial_port *port; /* USB port with which associated */
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};
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static void setup_line(struct work_struct *work)
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{
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struct oti6858_private *priv = container_of(work,
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struct oti6858_private, delayed_setup_work.work);
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struct usb_serial_port *port = priv->port;
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struct oti6858_control_pkt *new_setup;
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unsigned long flags;
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int result;
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new_setup = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL);
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if (!new_setup) {
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/* we will try again */
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schedule_delayed_work(&priv->delayed_setup_work,
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msecs_to_jiffies(2));
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return;
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}
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result = usb_control_msg(port->serial->dev,
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usb_rcvctrlpipe(port->serial->dev, 0),
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OTI6858_REQ_T_GET_STATUS,
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OTI6858_REQ_GET_STATUS,
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0, 0,
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new_setup, OTI6858_CTRL_PKT_SIZE,
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100);
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if (result != OTI6858_CTRL_PKT_SIZE) {
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dev_err(&port->dev, "%s(): error reading status\n", __func__);
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kfree(new_setup);
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/* we will try again */
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schedule_delayed_work(&priv->delayed_setup_work,
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msecs_to_jiffies(2));
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return;
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}
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spin_lock_irqsave(&priv->lock, flags);
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if (!OTI6858_CTRL_EQUALS_PENDING(new_setup, priv)) {
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new_setup->divisor = priv->pending_setup.divisor;
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new_setup->control = priv->pending_setup.control;
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new_setup->frame_fmt = priv->pending_setup.frame_fmt;
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spin_unlock_irqrestore(&priv->lock, flags);
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result = usb_control_msg(port->serial->dev,
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usb_sndctrlpipe(port->serial->dev, 0),
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OTI6858_REQ_T_SET_LINE,
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OTI6858_REQ_SET_LINE,
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0, 0,
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new_setup, OTI6858_CTRL_PKT_SIZE,
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100);
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} else {
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spin_unlock_irqrestore(&priv->lock, flags);
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result = 0;
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}
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kfree(new_setup);
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spin_lock_irqsave(&priv->lock, flags);
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if (result != OTI6858_CTRL_PKT_SIZE)
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priv->transient = 0;
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priv->setup_done = 1;
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spin_unlock_irqrestore(&priv->lock, flags);
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dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__);
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result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
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if (result != 0) {
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dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n",
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__func__, result);
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}
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}
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static void send_data(struct work_struct *work)
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{
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struct oti6858_private *priv = container_of(work,
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struct oti6858_private, delayed_write_work.work);
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struct usb_serial_port *port = priv->port;
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int count = 0, result;
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unsigned long flags;
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u8 *allow;
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spin_lock_irqsave(&priv->lock, flags);
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if (priv->flags.write_urb_in_use) {
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spin_unlock_irqrestore(&priv->lock, flags);
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schedule_delayed_work(&priv->delayed_write_work,
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msecs_to_jiffies(2));
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return;
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}
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priv->flags.write_urb_in_use = 1;
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spin_unlock_irqrestore(&priv->lock, flags);
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spin_lock_irqsave(&port->lock, flags);
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count = kfifo_len(&port->write_fifo);
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spin_unlock_irqrestore(&port->lock, flags);
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if (count > port->bulk_out_size)
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count = port->bulk_out_size;
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if (count != 0) {
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allow = kmalloc(1, GFP_KERNEL);
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if (!allow)
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return;
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result = usb_control_msg(port->serial->dev,
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usb_rcvctrlpipe(port->serial->dev, 0),
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OTI6858_REQ_T_CHECK_TXBUFF,
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OTI6858_REQ_CHECK_TXBUFF,
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count, 0, allow, 1, 100);
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if (result != 1 || *allow != 0)
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count = 0;
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kfree(allow);
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}
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if (count == 0) {
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priv->flags.write_urb_in_use = 0;
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dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__);
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result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
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if (result != 0) {
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dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n",
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__func__, result);
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}
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return;
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}
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count = kfifo_out_locked(&port->write_fifo,
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port->write_urb->transfer_buffer,
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count, &port->lock);
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port->write_urb->transfer_buffer_length = count;
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result = usb_submit_urb(port->write_urb, GFP_NOIO);
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if (result != 0) {
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dev_err_console(port, "%s(): usb_submit_urb() failed with error %d\n",
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__func__, result);
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priv->flags.write_urb_in_use = 0;
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}
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usb_serial_port_softint(port);
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}
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static int oti6858_port_probe(struct usb_serial_port *port)
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{
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struct oti6858_private *priv;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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spin_lock_init(&priv->lock);
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priv->port = port;
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INIT_DELAYED_WORK(&priv->delayed_setup_work, setup_line);
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INIT_DELAYED_WORK(&priv->delayed_write_work, send_data);
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usb_set_serial_port_data(port, priv);
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port->port.drain_delay = 256; /* FIXME: check the FIFO length */
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return 0;
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}
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static int oti6858_port_remove(struct usb_serial_port *port)
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{
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struct oti6858_private *priv;
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priv = usb_get_serial_port_data(port);
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kfree(priv);
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return 0;
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}
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static int oti6858_write(struct tty_struct *tty, struct usb_serial_port *port,
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const unsigned char *buf, int count)
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{
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if (!count)
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return count;
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count = kfifo_in_locked(&port->write_fifo, buf, count, &port->lock);
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return count;
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}
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static int oti6858_write_room(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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int room = 0;
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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room = kfifo_avail(&port->write_fifo);
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spin_unlock_irqrestore(&port->lock, flags);
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return room;
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}
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static int oti6858_chars_in_buffer(struct tty_struct *tty)
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{
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struct usb_serial_port *port = tty->driver_data;
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int chars = 0;
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unsigned long flags;
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spin_lock_irqsave(&port->lock, flags);
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chars = kfifo_len(&port->write_fifo);
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spin_unlock_irqrestore(&port->lock, flags);
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return chars;
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}
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static void oti6858_init_termios(struct tty_struct *tty)
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{
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tty->termios = tty_std_termios;
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tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL;
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tty->termios.c_ispeed = 38400;
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tty->termios.c_ospeed = 38400;
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}
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static void oti6858_set_termios(struct tty_struct *tty,
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struct usb_serial_port *port, struct ktermios *old_termios)
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{
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struct oti6858_private *priv = usb_get_serial_port_data(port);
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unsigned long flags;
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unsigned int cflag;
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u8 frame_fmt, control;
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__le16 divisor;
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int br;
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cflag = tty->termios.c_cflag;
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spin_lock_irqsave(&priv->lock, flags);
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divisor = priv->pending_setup.divisor;
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frame_fmt = priv->pending_setup.frame_fmt;
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control = priv->pending_setup.control;
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spin_unlock_irqrestore(&priv->lock, flags);
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frame_fmt &= ~FMT_DATA_BITS_MASK;
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switch (cflag & CSIZE) {
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case CS5:
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frame_fmt |= FMT_DATA_BITS_5;
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break;
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case CS6:
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frame_fmt |= FMT_DATA_BITS_6;
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break;
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case CS7:
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frame_fmt |= FMT_DATA_BITS_7;
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break;
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default:
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case CS8:
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frame_fmt |= FMT_DATA_BITS_8;
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break;
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}
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/* manufacturer claims that this device can work with baud rates
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* up to 3 Mbps; I've tested it only on 115200 bps, so I can't
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* guarantee that any other baud rate will work (especially
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* the higher ones)
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*/
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br = tty_get_baud_rate(tty);
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if (br == 0) {
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divisor = 0;
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} else {
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int real_br;
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int new_divisor;
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br = min(br, OTI6858_MAX_BAUD_RATE);
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new_divisor = (96000000 + 8 * br) / (16 * br);
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real_br = 96000000 / (16 * new_divisor);
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divisor = cpu_to_le16(new_divisor);
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tty_encode_baud_rate(tty, real_br, real_br);
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}
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frame_fmt &= ~FMT_STOP_BITS_MASK;
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if ((cflag & CSTOPB) != 0)
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frame_fmt |= FMT_STOP_BITS_2;
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else
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frame_fmt |= FMT_STOP_BITS_1;
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frame_fmt &= ~FMT_PARITY_MASK;
|
|
if ((cflag & PARENB) != 0) {
|
|
if ((cflag & PARODD) != 0)
|
|
frame_fmt |= FMT_PARITY_ODD;
|
|
else
|
|
frame_fmt |= FMT_PARITY_EVEN;
|
|
} else {
|
|
frame_fmt |= FMT_PARITY_NONE;
|
|
}
|
|
|
|
control &= ~CONTROL_MASK;
|
|
if ((cflag & CRTSCTS) != 0)
|
|
control |= (CONTROL_DTR_HIGH | CONTROL_RTS_HIGH);
|
|
|
|
/* change control lines if we are switching to or from B0 */
|
|
/* FIXME:
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control = priv->line_control;
|
|
if ((cflag & CBAUD) == B0)
|
|
priv->line_control &= ~(CONTROL_DTR | CONTROL_RTS);
|
|
else
|
|
priv->line_control |= (CONTROL_DTR | CONTROL_RTS);
|
|
if (control != priv->line_control) {
|
|
control = priv->line_control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
set_control_lines(serial->dev, control);
|
|
} else {
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
*/
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (divisor != priv->pending_setup.divisor
|
|
|| control != priv->pending_setup.control
|
|
|| frame_fmt != priv->pending_setup.frame_fmt) {
|
|
priv->pending_setup.divisor = divisor;
|
|
priv->pending_setup.control = control;
|
|
priv->pending_setup.frame_fmt = frame_fmt;
|
|
}
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
struct usb_serial *serial = port->serial;
|
|
struct oti6858_control_pkt *buf;
|
|
unsigned long flags;
|
|
int result;
|
|
|
|
usb_clear_halt(serial->dev, port->write_urb->pipe);
|
|
usb_clear_halt(serial->dev, port->read_urb->pipe);
|
|
|
|
buf = kmalloc(OTI6858_CTRL_PKT_SIZE, GFP_KERNEL);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
|
|
OTI6858_REQ_T_GET_STATUS,
|
|
OTI6858_REQ_GET_STATUS,
|
|
0, 0,
|
|
buf, OTI6858_CTRL_PKT_SIZE,
|
|
100);
|
|
if (result != OTI6858_CTRL_PKT_SIZE) {
|
|
/* assume default (after power-on reset) values */
|
|
buf->divisor = cpu_to_le16(0x009c); /* 38400 bps */
|
|
buf->frame_fmt = 0x03; /* 8N1 */
|
|
buf->something = 0x43;
|
|
buf->control = 0x4c; /* DTR, RTS */
|
|
buf->tx_status = 0x00;
|
|
buf->pin_state = 0x5b; /* RTS, CTS, DSR, DTR, RI, DCD */
|
|
buf->rx_bytes_avail = 0x00;
|
|
}
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
memcpy(&priv->status, buf, OTI6858_CTRL_PKT_SIZE);
|
|
priv->pending_setup.divisor = buf->divisor;
|
|
priv->pending_setup.frame_fmt = buf->frame_fmt;
|
|
priv->pending_setup.control = buf->control;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
kfree(buf);
|
|
|
|
dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__);
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
|
|
if (result != 0) {
|
|
dev_err(&port->dev, "%s(): usb_submit_urb() failed with error %d\n",
|
|
__func__, result);
|
|
oti6858_close(port);
|
|
return result;
|
|
}
|
|
|
|
/* setup termios */
|
|
if (tty)
|
|
oti6858_set_termios(tty, port, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void oti6858_close(struct usb_serial_port *port)
|
|
{
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
/* clear out any remaining data in the buffer */
|
|
kfifo_reset_out(&port->write_fifo);
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
dev_dbg(&port->dev, "%s(): after buf_clear()\n", __func__);
|
|
|
|
/* cancel scheduled setup */
|
|
cancel_delayed_work_sync(&priv->delayed_setup_work);
|
|
cancel_delayed_work_sync(&priv->delayed_write_work);
|
|
|
|
/* shutdown our urbs */
|
|
dev_dbg(&port->dev, "%s(): shutting down urbs\n", __func__);
|
|
usb_kill_urb(port->write_urb);
|
|
usb_kill_urb(port->read_urb);
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
}
|
|
|
|
static int oti6858_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
u8 control;
|
|
|
|
dev_dbg(&port->dev, "%s(set = 0x%08x, clear = 0x%08x)\n",
|
|
__func__, set, clear);
|
|
|
|
/* FIXME: check if this is correct (active high/low) */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
control = priv->pending_setup.control;
|
|
if ((set & TIOCM_RTS) != 0)
|
|
control |= CONTROL_RTS_HIGH;
|
|
if ((set & TIOCM_DTR) != 0)
|
|
control |= CONTROL_DTR_HIGH;
|
|
if ((clear & TIOCM_RTS) != 0)
|
|
control &= ~CONTROL_RTS_HIGH;
|
|
if ((clear & TIOCM_DTR) != 0)
|
|
control &= ~CONTROL_DTR_HIGH;
|
|
|
|
if (control != priv->pending_setup.control)
|
|
priv->pending_setup.control = control;
|
|
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int oti6858_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
unsigned pin_state;
|
|
unsigned result = 0;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
pin_state = priv->status.pin_state & PIN_MASK;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
/* FIXME: check if this is correct (active high/low) */
|
|
if ((pin_state & PIN_RTS) != 0)
|
|
result |= TIOCM_RTS;
|
|
if ((pin_state & PIN_CTS) != 0)
|
|
result |= TIOCM_CTS;
|
|
if ((pin_state & PIN_DSR) != 0)
|
|
result |= TIOCM_DSR;
|
|
if ((pin_state & PIN_DTR) != 0)
|
|
result |= TIOCM_DTR;
|
|
if ((pin_state & PIN_RI) != 0)
|
|
result |= TIOCM_RI;
|
|
if ((pin_state & PIN_DCD) != 0)
|
|
result |= TIOCM_CD;
|
|
|
|
dev_dbg(&port->dev, "%s() = 0x%08x\n", __func__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static void oti6858_read_int_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
int transient = 0, can_recv = 0, resubmit = 1;
|
|
int status = urb->status;
|
|
|
|
switch (status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n",
|
|
__func__, status);
|
|
return;
|
|
default:
|
|
dev_dbg(&urb->dev->dev, "%s(): nonzero urb status received: %d\n",
|
|
__func__, status);
|
|
break;
|
|
}
|
|
|
|
if (status == 0 && urb->actual_length == OTI6858_CTRL_PKT_SIZE) {
|
|
struct oti6858_control_pkt *xs = urb->transfer_buffer;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
|
|
if (!priv->transient) {
|
|
if (!OTI6858_CTRL_EQUALS_PENDING(xs, priv)) {
|
|
if (xs->rx_bytes_avail == 0) {
|
|
priv->transient = 4;
|
|
priv->setup_done = 0;
|
|
resubmit = 0;
|
|
dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__);
|
|
schedule_delayed_work(&priv->delayed_setup_work, 0);
|
|
}
|
|
}
|
|
} else {
|
|
if (OTI6858_CTRL_EQUALS_PENDING(xs, priv)) {
|
|
priv->transient = 0;
|
|
} else if (!priv->setup_done) {
|
|
resubmit = 0;
|
|
} else if (--priv->transient == 0) {
|
|
if (xs->rx_bytes_avail == 0) {
|
|
priv->transient = 4;
|
|
priv->setup_done = 0;
|
|
resubmit = 0;
|
|
dev_dbg(&port->dev, "%s(): scheduling setup_line()\n", __func__);
|
|
schedule_delayed_work(&priv->delayed_setup_work, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!priv->transient) {
|
|
u8 delta = xs->pin_state ^ priv->status.pin_state;
|
|
|
|
if (delta & PIN_MSR_MASK) {
|
|
if (delta & PIN_CTS)
|
|
port->icount.cts++;
|
|
if (delta & PIN_DSR)
|
|
port->icount.dsr++;
|
|
if (delta & PIN_RI)
|
|
port->icount.rng++;
|
|
if (delta & PIN_DCD)
|
|
port->icount.dcd++;
|
|
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
}
|
|
|
|
memcpy(&priv->status, xs, OTI6858_CTRL_PKT_SIZE);
|
|
}
|
|
|
|
if (!priv->transient && xs->rx_bytes_avail != 0) {
|
|
can_recv = xs->rx_bytes_avail;
|
|
priv->flags.read_urb_in_use = 1;
|
|
}
|
|
|
|
transient = priv->transient;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
if (can_recv) {
|
|
int result;
|
|
|
|
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
|
if (result != 0) {
|
|
priv->flags.read_urb_in_use = 0;
|
|
dev_err(&port->dev, "%s(): usb_submit_urb() failed,"
|
|
" error %d\n", __func__, result);
|
|
} else {
|
|
resubmit = 0;
|
|
}
|
|
} else if (!transient) {
|
|
unsigned long flags;
|
|
int count;
|
|
|
|
spin_lock_irqsave(&port->lock, flags);
|
|
count = kfifo_len(&port->write_fifo);
|
|
spin_unlock_irqrestore(&port->lock, flags);
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
if (priv->flags.write_urb_in_use == 0 && count != 0) {
|
|
schedule_delayed_work(&priv->delayed_write_work, 0);
|
|
resubmit = 0;
|
|
}
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
}
|
|
|
|
if (resubmit) {
|
|
int result;
|
|
|
|
/* dev_dbg(&urb->dev->dev, "%s(): submitting interrupt urb\n", __func__); */
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result != 0) {
|
|
dev_err(&urb->dev->dev,
|
|
"%s(): usb_submit_urb() failed with"
|
|
" error %d\n", __func__, result);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void oti6858_read_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
unsigned char *data = urb->transfer_buffer;
|
|
unsigned long flags;
|
|
int status = urb->status;
|
|
int result;
|
|
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
priv->flags.read_urb_in_use = 0;
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
if (status != 0) {
|
|
dev_dbg(&urb->dev->dev, "%s(): unable to handle the error, exiting\n", __func__);
|
|
return;
|
|
}
|
|
|
|
if (urb->actual_length > 0) {
|
|
tty_insert_flip_string(&port->port, data, urb->actual_length);
|
|
tty_flip_buffer_push(&port->port);
|
|
}
|
|
|
|
/* schedule the interrupt urb */
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
|
|
if (result != 0 && result != -EPERM) {
|
|
dev_err(&port->dev, "%s(): usb_submit_urb() failed,"
|
|
" error %d\n", __func__, result);
|
|
}
|
|
}
|
|
|
|
static void oti6858_write_bulk_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = urb->context;
|
|
struct oti6858_private *priv = usb_get_serial_port_data(port);
|
|
int status = urb->status;
|
|
int result;
|
|
|
|
switch (status) {
|
|
case 0:
|
|
/* success */
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/* this urb is terminated, clean up */
|
|
dev_dbg(&urb->dev->dev, "%s(): urb shutting down with status: %d\n", __func__, status);
|
|
priv->flags.write_urb_in_use = 0;
|
|
return;
|
|
default:
|
|
/* error in the urb, so we have to resubmit it */
|
|
dev_dbg(&urb->dev->dev, "%s(): nonzero write bulk status received: %d\n", __func__, status);
|
|
dev_dbg(&urb->dev->dev, "%s(): overflow in write\n", __func__);
|
|
|
|
port->write_urb->transfer_buffer_length = 1;
|
|
result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
|
|
if (result) {
|
|
dev_err_console(port, "%s(): usb_submit_urb() failed,"
|
|
" error %d\n", __func__, result);
|
|
} else {
|
|
return;
|
|
}
|
|
}
|
|
|
|
priv->flags.write_urb_in_use = 0;
|
|
|
|
/* schedule the interrupt urb if we are still open */
|
|
dev_dbg(&port->dev, "%s(): submitting interrupt urb\n", __func__);
|
|
result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
|
|
if (result != 0) {
|
|
dev_err(&port->dev, "%s(): failed submitting int urb,"
|
|
" error %d\n", __func__, result);
|
|
}
|
|
}
|
|
|
|
module_usb_serial_driver(serial_drivers, id_table);
|
|
|
|
MODULE_DESCRIPTION(OTI6858_DESCRIPTION);
|
|
MODULE_AUTHOR(OTI6858_AUTHOR);
|
|
MODULE_LICENSE("GPL");
|