1512 lines
44 KiB
C
1512 lines
44 KiB
C
/*
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* USB ConnectTech WhiteHEAT driver
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*
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* Copyright (C) 2002
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* Connect Tech Inc.
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*
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* Copyright (C) 1999 - 2001
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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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* (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
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* Upgrade to full working driver
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*
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* (05/30/2001) gkh
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* switched from using spinlock to a semaphore, which fixes lots of problems.
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*
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* (04/08/2001) gb
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* Identify version on module load.
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*
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* 2001_Mar_19 gkh
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* Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
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* than once, and the got the proper usb_device_id table entries so
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* the driver works again.
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*
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* (11/01/2000) Adam J. Richter
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* usb_device_id table support
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*
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* (10/05/2000) gkh
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* Fixed bug with urb->dev not being set properly, now that the usb
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* core needs it.
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*
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* (10/03/2000) smd
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* firmware is improved to guard against crap sent to device
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* firmware now replies CMD_FAILURE on bad things
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* read_callback fix you provided for private info struct
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* command_finished now indicates success or fail
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* setup_port struct now packed to avoid gcc padding
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* firmware uses 1 based port numbering, driver now handles that
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*
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* (09/11/2000) gkh
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* Removed DEBUG #ifdefs with call to usb_serial_debug_data
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*
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* (07/19/2000) gkh
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* Added module_init and module_exit functions to handle the fact that this
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* driver is a loadable module now.
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* Fixed bug with port->minor that was found by Al Borchers
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*
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* (07/04/2000) gkh
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* Added support for port settings. Baud rate can now be changed. Line signals
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* are not transferred to and from the tty layer yet, but things seem to be
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* working well now.
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*
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* (05/04/2000) gkh
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* First cut at open and close commands. Data can flow through the ports at
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* default speeds now.
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*
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* (03/26/2000) gkh
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* Split driver up into device specific pieces.
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*
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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/init.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/module.h>
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#include <linux/spinlock.h>
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#include <asm/uaccess.h>
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#include <asm/termbits.h>
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#include <linux/usb.h>
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#include <linux/serial_reg.h>
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#include <linux/serial.h>
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#include <linux/usb/serial.h>
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#include "whiteheat_fw.h" /* firmware for the ConnectTech WhiteHEAT device */
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#include "whiteheat.h" /* WhiteHEAT specific commands */
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static int debug;
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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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* Version Information
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*/
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#define DRIVER_VERSION "v2.0"
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#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Stuart MacDonald <stuartm@connecttech.com>"
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#define DRIVER_DESC "USB ConnectTech WhiteHEAT driver"
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#define CONNECT_TECH_VENDOR_ID 0x0710
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#define CONNECT_TECH_FAKE_WHITE_HEAT_ID 0x0001
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#define CONNECT_TECH_WHITE_HEAT_ID 0x8001
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/*
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ID tables for whiteheat are unusual, because we want to different
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things for different versions of the device. Eventually, this
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will be doable from a single table. But, for now, we define two
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separate ID tables, and then a third table that combines them
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just for the purpose of exporting the autoloading information.
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*/
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static struct usb_device_id id_table_std [] = {
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{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
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{ } /* Terminating entry */
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};
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static struct usb_device_id id_table_prerenumeration [] = {
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{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
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{ } /* Terminating entry */
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};
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static struct usb_device_id id_table_combined [] = {
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{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_WHITE_HEAT_ID) },
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{ USB_DEVICE(CONNECT_TECH_VENDOR_ID, CONNECT_TECH_FAKE_WHITE_HEAT_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, id_table_combined);
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static struct usb_driver whiteheat_driver = {
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.name = "whiteheat",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table_combined,
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.no_dynamic_id = 1,
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};
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/* function prototypes for the Connect Tech WhiteHEAT prerenumeration device */
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static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id);
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static int whiteheat_firmware_attach (struct usb_serial *serial);
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/* function prototypes for the Connect Tech WhiteHEAT serial converter */
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static int whiteheat_attach (struct usb_serial *serial);
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static void whiteheat_shutdown (struct usb_serial *serial);
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static int whiteheat_open (struct usb_serial_port *port, struct file *filp);
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static void whiteheat_close (struct usb_serial_port *port, struct file *filp);
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static int whiteheat_write (struct usb_serial_port *port, const unsigned char *buf, int count);
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static int whiteheat_write_room (struct usb_serial_port *port);
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static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg);
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static void whiteheat_set_termios (struct usb_serial_port *port, struct termios * old);
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static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file);
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static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
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static void whiteheat_break_ctl (struct usb_serial_port *port, int break_state);
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static int whiteheat_chars_in_buffer (struct usb_serial_port *port);
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static void whiteheat_throttle (struct usb_serial_port *port);
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static void whiteheat_unthrottle (struct usb_serial_port *port);
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static void whiteheat_read_callback (struct urb *urb);
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static void whiteheat_write_callback (struct urb *urb);
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static struct usb_serial_driver whiteheat_fake_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "whiteheatnofirm",
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},
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.description = "Connect Tech - WhiteHEAT - (prerenumeration)",
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.id_table = id_table_prerenumeration,
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.num_interrupt_in = NUM_DONT_CARE,
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.num_bulk_in = NUM_DONT_CARE,
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.num_bulk_out = NUM_DONT_CARE,
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.num_ports = 1,
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.probe = whiteheat_firmware_download,
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.attach = whiteheat_firmware_attach,
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};
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static struct usb_serial_driver whiteheat_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "whiteheat",
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},
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.description = "Connect Tech - WhiteHEAT",
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.id_table = id_table_std,
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.num_interrupt_in = NUM_DONT_CARE,
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.num_bulk_in = NUM_DONT_CARE,
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.num_bulk_out = NUM_DONT_CARE,
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.num_ports = 4,
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.attach = whiteheat_attach,
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.shutdown = whiteheat_shutdown,
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.open = whiteheat_open,
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.close = whiteheat_close,
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.write = whiteheat_write,
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.write_room = whiteheat_write_room,
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.ioctl = whiteheat_ioctl,
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.set_termios = whiteheat_set_termios,
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.break_ctl = whiteheat_break_ctl,
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.tiocmget = whiteheat_tiocmget,
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.tiocmset = whiteheat_tiocmset,
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.chars_in_buffer = whiteheat_chars_in_buffer,
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.throttle = whiteheat_throttle,
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.unthrottle = whiteheat_unthrottle,
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.read_bulk_callback = whiteheat_read_callback,
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.write_bulk_callback = whiteheat_write_callback,
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};
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struct whiteheat_command_private {
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spinlock_t lock;
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__u8 port_running;
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__u8 command_finished;
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wait_queue_head_t wait_command; /* for handling sleeping while waiting for a command to finish */
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__u8 result_buffer[64];
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};
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#define THROTTLED 0x01
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#define ACTUALLY_THROTTLED 0x02
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static int urb_pool_size = 8;
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struct whiteheat_urb_wrap {
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struct list_head list;
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struct urb *urb;
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};
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struct whiteheat_private {
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spinlock_t lock;
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__u8 flags;
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__u8 mcr;
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struct list_head rx_urbs_free;
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struct list_head rx_urbs_submitted;
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struct list_head rx_urb_q;
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struct work_struct rx_work;
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struct usb_serial_port *port;
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struct list_head tx_urbs_free;
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struct list_head tx_urbs_submitted;
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};
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/* local function prototypes */
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static int start_command_port(struct usb_serial *serial);
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static void stop_command_port(struct usb_serial *serial);
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static void command_port_write_callback(struct urb *urb);
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static void command_port_read_callback(struct urb *urb);
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static int start_port_read(struct usb_serial_port *port);
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static struct whiteheat_urb_wrap *urb_to_wrap(struct urb *urb, struct list_head *head);
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static struct list_head *list_first(struct list_head *head);
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static void rx_data_softint(struct work_struct *work);
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static int firm_send_command(struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize);
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static int firm_open(struct usb_serial_port *port);
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static int firm_close(struct usb_serial_port *port);
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static int firm_setup_port(struct usb_serial_port *port);
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static int firm_set_rts(struct usb_serial_port *port, __u8 onoff);
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static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff);
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static int firm_set_break(struct usb_serial_port *port, __u8 onoff);
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static int firm_purge(struct usb_serial_port *port, __u8 rxtx);
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static int firm_get_dtr_rts(struct usb_serial_port *port);
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static int firm_report_tx_done(struct usb_serial_port *port);
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#define COMMAND_PORT 4
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#define COMMAND_TIMEOUT (2*HZ) /* 2 second timeout for a command */
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#define COMMAND_TIMEOUT_MS 2000
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#define CLOSING_DELAY (30 * HZ)
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/*****************************************************************************
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* Connect Tech's White Heat prerenumeration driver functions
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*****************************************************************************/
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/* steps to download the firmware to the WhiteHEAT device:
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- hold the reset (by writing to the reset bit of the CPUCS register)
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- download the VEND_AX.HEX file to the chip using VENDOR_REQUEST-ANCHOR_LOAD
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- release the reset (by writing to the CPUCS register)
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- download the WH.HEX file for all addresses greater than 0x1b3f using
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VENDOR_REQUEST-ANCHOR_EXTERNAL_RAM_LOAD
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- hold the reset
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- download the WH.HEX file for all addresses less than 0x1b40 using
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VENDOR_REQUEST_ANCHOR_LOAD
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- release the reset
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- device renumerated itself and comes up as new device id with all
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firmware download completed.
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*/
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static int whiteheat_firmware_download (struct usb_serial *serial, const struct usb_device_id *id)
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{
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int response;
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const struct whiteheat_hex_record *record;
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dbg("%s", __FUNCTION__);
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response = ezusb_set_reset (serial, 1);
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record = &whiteheat_loader[0];
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while (record->address != 0xffff) {
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response = ezusb_writememory (serial, record->address,
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(unsigned char *)record->data, record->data_size, 0xa0);
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if (response < 0) {
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err("%s - ezusb_writememory failed for loader (%d %04X %p %d)",
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__FUNCTION__, response, record->address, record->data, record->data_size);
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break;
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}
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++record;
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}
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response = ezusb_set_reset (serial, 0);
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record = &whiteheat_firmware[0];
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while (record->address < 0x1b40) {
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++record;
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}
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while (record->address != 0xffff) {
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response = ezusb_writememory (serial, record->address,
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(unsigned char *)record->data, record->data_size, 0xa3);
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if (response < 0) {
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err("%s - ezusb_writememory failed for first firmware step (%d %04X %p %d)",
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__FUNCTION__, response, record->address, record->data, record->data_size);
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break;
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}
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++record;
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}
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response = ezusb_set_reset (serial, 1);
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record = &whiteheat_firmware[0];
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while (record->address < 0x1b40) {
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response = ezusb_writememory (serial, record->address,
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(unsigned char *)record->data, record->data_size, 0xa0);
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if (response < 0) {
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err("%s - ezusb_writememory failed for second firmware step (%d %04X %p %d)",
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__FUNCTION__, response, record->address, record->data, record->data_size);
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break;
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}
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++record;
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}
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response = ezusb_set_reset (serial, 0);
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|
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return 0;
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}
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|
|
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static int whiteheat_firmware_attach (struct usb_serial *serial)
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{
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/* We want this device to fail to have a driver assigned to it */
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return 1;
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}
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|
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/*****************************************************************************
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* Connect Tech's White Heat serial driver functions
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*****************************************************************************/
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static int whiteheat_attach (struct usb_serial *serial)
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{
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struct usb_serial_port *command_port;
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struct whiteheat_command_private *command_info;
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struct usb_serial_port *port;
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struct whiteheat_private *info;
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struct whiteheat_hw_info *hw_info;
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int pipe;
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int ret;
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int alen;
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__u8 *command;
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__u8 *result;
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int i;
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int j;
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struct urb *urb;
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int buf_size;
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struct whiteheat_urb_wrap *wrap;
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struct list_head *tmp;
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command_port = serial->port[COMMAND_PORT];
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pipe = usb_sndbulkpipe (serial->dev, command_port->bulk_out_endpointAddress);
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command = kmalloc(2, GFP_KERNEL);
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if (!command)
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goto no_command_buffer;
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command[0] = WHITEHEAT_GET_HW_INFO;
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command[1] = 0;
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|
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result = kmalloc(sizeof(*hw_info) + 1, GFP_KERNEL);
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if (!result)
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goto no_result_buffer;
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/*
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* When the module is reloaded the firmware is still there and
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* the endpoints are still in the usb core unchanged. This is the
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* unlinking bug in disguise. Same for the call below.
|
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*/
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usb_clear_halt(serial->dev, pipe);
|
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ret = usb_bulk_msg (serial->dev, pipe, command, 2, &alen, COMMAND_TIMEOUT_MS);
|
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if (ret) {
|
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err("%s: Couldn't send command [%d]", serial->type->description, ret);
|
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goto no_firmware;
|
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} else if (alen != 2) {
|
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err("%s: Send command incomplete [%d]", serial->type->description, alen);
|
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goto no_firmware;
|
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}
|
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|
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pipe = usb_rcvbulkpipe (serial->dev, command_port->bulk_in_endpointAddress);
|
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/* See the comment on the usb_clear_halt() above */
|
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usb_clear_halt(serial->dev, pipe);
|
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ret = usb_bulk_msg (serial->dev, pipe, result, sizeof(*hw_info) + 1, &alen, COMMAND_TIMEOUT_MS);
|
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if (ret) {
|
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err("%s: Couldn't get results [%d]", serial->type->description, ret);
|
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goto no_firmware;
|
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} else if (alen != sizeof(*hw_info) + 1) {
|
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err("%s: Get results incomplete [%d]", serial->type->description, alen);
|
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goto no_firmware;
|
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} else if (result[0] != command[0]) {
|
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err("%s: Command failed [%d]", serial->type->description, result[0]);
|
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goto no_firmware;
|
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}
|
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|
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hw_info = (struct whiteheat_hw_info *)&result[1];
|
|
|
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info("%s: Driver %s: Firmware v%d.%02d", serial->type->description,
|
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DRIVER_VERSION, hw_info->sw_major_rev, hw_info->sw_minor_rev);
|
|
|
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for (i = 0; i < serial->num_ports; i++) {
|
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port = serial->port[i];
|
|
|
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info = (struct whiteheat_private *)kmalloc(sizeof(struct whiteheat_private), GFP_KERNEL);
|
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if (info == NULL) {
|
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err("%s: Out of memory for port structures\n", serial->type->description);
|
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goto no_private;
|
|
}
|
|
|
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spin_lock_init(&info->lock);
|
|
info->flags = 0;
|
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info->mcr = 0;
|
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INIT_WORK(&info->rx_work, rx_data_softint);
|
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info->port = port;
|
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|
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INIT_LIST_HEAD(&info->rx_urbs_free);
|
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INIT_LIST_HEAD(&info->rx_urbs_submitted);
|
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INIT_LIST_HEAD(&info->rx_urb_q);
|
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INIT_LIST_HEAD(&info->tx_urbs_free);
|
|
INIT_LIST_HEAD(&info->tx_urbs_submitted);
|
|
|
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for (j = 0; j < urb_pool_size; j++) {
|
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urb = usb_alloc_urb(0, GFP_KERNEL);
|
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if (!urb) {
|
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err("No free urbs available");
|
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goto no_rx_urb;
|
|
}
|
|
buf_size = port->read_urb->transfer_buffer_length;
|
|
urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
|
|
if (!urb->transfer_buffer) {
|
|
err("Couldn't allocate urb buffer");
|
|
goto no_rx_buf;
|
|
}
|
|
wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
|
|
if (!wrap) {
|
|
err("Couldn't allocate urb wrapper");
|
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goto no_rx_wrap;
|
|
}
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_rcvbulkpipe(serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
urb->transfer_buffer, buf_size,
|
|
whiteheat_read_callback, port);
|
|
wrap->urb = urb;
|
|
list_add(&wrap->list, &info->rx_urbs_free);
|
|
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!urb) {
|
|
err("No free urbs available");
|
|
goto no_tx_urb;
|
|
}
|
|
buf_size = port->write_urb->transfer_buffer_length;
|
|
urb->transfer_buffer = kmalloc(buf_size, GFP_KERNEL);
|
|
if (!urb->transfer_buffer) {
|
|
err("Couldn't allocate urb buffer");
|
|
goto no_tx_buf;
|
|
}
|
|
wrap = kmalloc(sizeof(*wrap), GFP_KERNEL);
|
|
if (!wrap) {
|
|
err("Couldn't allocate urb wrapper");
|
|
goto no_tx_wrap;
|
|
}
|
|
usb_fill_bulk_urb(urb, serial->dev,
|
|
usb_sndbulkpipe(serial->dev,
|
|
port->bulk_out_endpointAddress),
|
|
urb->transfer_buffer, buf_size,
|
|
whiteheat_write_callback, port);
|
|
wrap->urb = urb;
|
|
list_add(&wrap->list, &info->tx_urbs_free);
|
|
}
|
|
|
|
usb_set_serial_port_data(port, info);
|
|
}
|
|
|
|
command_info = (struct whiteheat_command_private *)kmalloc(sizeof(struct whiteheat_command_private), GFP_KERNEL);
|
|
if (command_info == NULL) {
|
|
err("%s: Out of memory for port structures\n", serial->type->description);
|
|
goto no_command_private;
|
|
}
|
|
|
|
spin_lock_init(&command_info->lock);
|
|
command_info->port_running = 0;
|
|
init_waitqueue_head(&command_info->wait_command);
|
|
usb_set_serial_port_data(command_port, command_info);
|
|
command_port->write_urb->complete = command_port_write_callback;
|
|
command_port->read_urb->complete = command_port_read_callback;
|
|
kfree(result);
|
|
kfree(command);
|
|
|
|
return 0;
|
|
|
|
no_firmware:
|
|
/* Firmware likely not running */
|
|
err("%s: Unable to retrieve firmware version, try replugging\n", serial->type->description);
|
|
err("%s: If the firmware is not running (status led not blinking)\n", serial->type->description);
|
|
err("%s: please contact support@connecttech.com\n", serial->type->description);
|
|
kfree(result);
|
|
return -ENODEV;
|
|
|
|
no_command_private:
|
|
for (i = serial->num_ports - 1; i >= 0; i--) {
|
|
port = serial->port[i];
|
|
info = usb_get_serial_port_data(port);
|
|
for (j = urb_pool_size - 1; j >= 0; j--) {
|
|
tmp = list_first(&info->tx_urbs_free);
|
|
list_del(tmp);
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
kfree(wrap);
|
|
no_tx_wrap:
|
|
kfree(urb->transfer_buffer);
|
|
no_tx_buf:
|
|
usb_free_urb(urb);
|
|
no_tx_urb:
|
|
tmp = list_first(&info->rx_urbs_free);
|
|
list_del(tmp);
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
kfree(wrap);
|
|
no_rx_wrap:
|
|
kfree(urb->transfer_buffer);
|
|
no_rx_buf:
|
|
usb_free_urb(urb);
|
|
no_rx_urb:
|
|
;
|
|
}
|
|
kfree(info);
|
|
no_private:
|
|
;
|
|
}
|
|
kfree(result);
|
|
no_result_buffer:
|
|
kfree(command);
|
|
no_command_buffer:
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
static void whiteheat_shutdown (struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *command_port;
|
|
struct usb_serial_port *port;
|
|
struct whiteheat_private *info;
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct urb *urb;
|
|
struct list_head *tmp;
|
|
struct list_head *tmp2;
|
|
int i;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
/* free up our private data for our command port */
|
|
command_port = serial->port[COMMAND_PORT];
|
|
kfree (usb_get_serial_port_data(command_port));
|
|
|
|
for (i = 0; i < serial->num_ports; i++) {
|
|
port = serial->port[i];
|
|
info = usb_get_serial_port_data(port);
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
|
|
list_del(tmp);
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
kfree(wrap);
|
|
kfree(urb->transfer_buffer);
|
|
usb_free_urb(urb);
|
|
}
|
|
list_for_each_safe(tmp, tmp2, &info->tx_urbs_free) {
|
|
list_del(tmp);
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
kfree(wrap);
|
|
kfree(urb->transfer_buffer);
|
|
usb_free_urb(urb);
|
|
}
|
|
kfree(info);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static int whiteheat_open (struct usb_serial_port *port, struct file *filp)
|
|
{
|
|
int retval = 0;
|
|
struct termios old_term;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
retval = start_command_port(port->serial);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
if (port->tty)
|
|
port->tty->low_latency = 1;
|
|
|
|
/* send an open port command */
|
|
retval = firm_open(port);
|
|
if (retval) {
|
|
stop_command_port(port->serial);
|
|
goto exit;
|
|
}
|
|
|
|
retval = firm_purge(port, WHITEHEAT_PURGE_RX | WHITEHEAT_PURGE_TX);
|
|
if (retval) {
|
|
firm_close(port);
|
|
stop_command_port(port->serial);
|
|
goto exit;
|
|
}
|
|
|
|
old_term.c_cflag = ~port->tty->termios->c_cflag;
|
|
old_term.c_iflag = ~port->tty->termios->c_iflag;
|
|
whiteheat_set_termios(port, &old_term);
|
|
|
|
/* Work around HCD bugs */
|
|
usb_clear_halt(port->serial->dev, port->read_urb->pipe);
|
|
usb_clear_halt(port->serial->dev, port->write_urb->pipe);
|
|
|
|
/* Start reading from the device */
|
|
retval = start_port_read(port);
|
|
if (retval) {
|
|
err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
|
|
firm_close(port);
|
|
stop_command_port(port->serial);
|
|
goto exit;
|
|
}
|
|
|
|
exit:
|
|
dbg("%s - exit, retval = %d", __FUNCTION__, retval);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void whiteheat_close(struct usb_serial_port *port, struct file * filp)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct urb *urb;
|
|
struct list_head *tmp;
|
|
struct list_head *tmp2;
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
/* filp is NULL when called from usb_serial_disconnect */
|
|
if (filp && (tty_hung_up_p(filp))) {
|
|
return;
|
|
}
|
|
|
|
port->tty->closing = 1;
|
|
|
|
/*
|
|
* Not currently in use; tty_wait_until_sent() calls
|
|
* serial_chars_in_buffer() which deadlocks on the second semaphore
|
|
* acquisition. This should be fixed at some point. Greg's been
|
|
* notified.
|
|
if ((filp->f_flags & (O_NDELAY | O_NONBLOCK)) == 0) {
|
|
tty_wait_until_sent(port->tty, CLOSING_DELAY);
|
|
}
|
|
*/
|
|
|
|
if (port->tty->driver->flush_buffer)
|
|
port->tty->driver->flush_buffer(port->tty);
|
|
tty_ldisc_flush(port->tty);
|
|
|
|
firm_report_tx_done(port);
|
|
|
|
firm_close(port);
|
|
|
|
/* shutdown our bulk reads and writes */
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
usb_kill_urb(urb);
|
|
list_move(tmp, &info->rx_urbs_free);
|
|
}
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urb_q)
|
|
list_move(tmp, &info->rx_urbs_free);
|
|
|
|
list_for_each_safe(tmp, tmp2, &info->tx_urbs_submitted) {
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
usb_kill_urb(urb);
|
|
list_move(tmp, &info->tx_urbs_free);
|
|
}
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
stop_command_port(port->serial);
|
|
|
|
port->tty->closing = 0;
|
|
}
|
|
|
|
|
|
static int whiteheat_write(struct usb_serial_port *port, const unsigned char *buf, int count)
|
|
{
|
|
struct usb_serial *serial = port->serial;
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct urb *urb;
|
|
int result;
|
|
int bytes;
|
|
int sent = 0;
|
|
unsigned long flags;
|
|
struct list_head *tmp;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (count == 0) {
|
|
dbg("%s - write request of 0 bytes", __FUNCTION__);
|
|
return (0);
|
|
}
|
|
|
|
while (count) {
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
if (list_empty(&info->tx_urbs_free)) {
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
break;
|
|
}
|
|
tmp = list_first(&info->tx_urbs_free);
|
|
list_del(tmp);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
bytes = (count > port->bulk_out_size) ? port->bulk_out_size : count;
|
|
memcpy (urb->transfer_buffer, buf + sent, bytes);
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, bytes, urb->transfer_buffer);
|
|
|
|
urb->dev = serial->dev;
|
|
urb->transfer_buffer_length = bytes;
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result) {
|
|
err("%s - failed submitting write urb, error %d", __FUNCTION__, result);
|
|
sent = result;
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_add(tmp, &info->tx_urbs_free);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
break;
|
|
} else {
|
|
sent += bytes;
|
|
count -= bytes;
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_add(tmp, &info->tx_urbs_submitted);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
}
|
|
}
|
|
|
|
return sent;
|
|
}
|
|
|
|
|
|
static int whiteheat_write_room(struct usb_serial_port *port)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct list_head *tmp;
|
|
int room = 0;
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_for_each(tmp, &info->tx_urbs_free)
|
|
room++;
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
room *= port->bulk_out_size;
|
|
|
|
dbg("%s - returns %d", __FUNCTION__, room);
|
|
return (room);
|
|
}
|
|
|
|
|
|
static int whiteheat_tiocmget (struct usb_serial_port *port, struct file *file)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
unsigned int modem_signals = 0;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
firm_get_dtr_rts(port);
|
|
if (info->mcr & UART_MCR_DTR)
|
|
modem_signals |= TIOCM_DTR;
|
|
if (info->mcr & UART_MCR_RTS)
|
|
modem_signals |= TIOCM_RTS;
|
|
|
|
return modem_signals;
|
|
}
|
|
|
|
|
|
static int whiteheat_tiocmset (struct usb_serial_port *port, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if (set & TIOCM_RTS)
|
|
info->mcr |= UART_MCR_RTS;
|
|
if (set & TIOCM_DTR)
|
|
info->mcr |= UART_MCR_DTR;
|
|
|
|
if (clear & TIOCM_RTS)
|
|
info->mcr &= ~UART_MCR_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
info->mcr &= ~UART_MCR_DTR;
|
|
|
|
firm_set_dtr(port, info->mcr & UART_MCR_DTR);
|
|
firm_set_rts(port, info->mcr & UART_MCR_RTS);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int whiteheat_ioctl (struct usb_serial_port *port, struct file * file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct serial_struct serstruct;
|
|
void __user *user_arg = (void __user *)arg;
|
|
|
|
dbg("%s - port %d, cmd 0x%.4x", __FUNCTION__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCGSERIAL:
|
|
memset(&serstruct, 0, sizeof(serstruct));
|
|
serstruct.type = PORT_16654;
|
|
serstruct.line = port->serial->minor;
|
|
serstruct.port = port->number;
|
|
serstruct.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
|
|
serstruct.xmit_fifo_size = port->bulk_out_size;
|
|
serstruct.custom_divisor = 0;
|
|
serstruct.baud_base = 460800;
|
|
serstruct.close_delay = CLOSING_DELAY;
|
|
serstruct.closing_wait = CLOSING_DELAY;
|
|
|
|
if (copy_to_user(user_arg, &serstruct, sizeof(serstruct)))
|
|
return -EFAULT;
|
|
|
|
break;
|
|
|
|
case TIOCSSERIAL:
|
|
if (copy_from_user(&serstruct, user_arg, sizeof(serstruct)))
|
|
return -EFAULT;
|
|
|
|
/*
|
|
* For now this is ignored. dip sets the ASYNC_[V]HI flags
|
|
* but this isn't used by us at all. Maybe someone somewhere
|
|
* will need the custom_divisor setting.
|
|
*/
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
|
|
static void whiteheat_set_termios (struct usb_serial_port *port, struct termios *old_termios)
|
|
{
|
|
dbg("%s -port %d", __FUNCTION__, port->number);
|
|
|
|
if ((!port->tty) || (!port->tty->termios)) {
|
|
dbg("%s - no tty structures", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
|
|
/* check that they really want us to change something */
|
|
if (old_termios) {
|
|
if ((port->tty->termios->c_cflag == old_termios->c_cflag) &&
|
|
(port->tty->termios->c_iflag == old_termios->c_iflag)) {
|
|
dbg("%s - nothing to change...", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
firm_setup_port(port);
|
|
|
|
exit:
|
|
return;
|
|
}
|
|
|
|
|
|
static void whiteheat_break_ctl(struct usb_serial_port *port, int break_state) {
|
|
firm_set_break(port, break_state);
|
|
}
|
|
|
|
|
|
static int whiteheat_chars_in_buffer(struct usb_serial_port *port)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct list_head *tmp;
|
|
struct whiteheat_urb_wrap *wrap;
|
|
int chars = 0;
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_for_each(tmp, &info->tx_urbs_submitted) {
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
chars += wrap->urb->transfer_buffer_length;
|
|
}
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
dbg ("%s - returns %d", __FUNCTION__, chars);
|
|
return (chars);
|
|
}
|
|
|
|
|
|
static void whiteheat_throttle (struct usb_serial_port *port)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
info->flags |= THROTTLED;
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
static void whiteheat_unthrottle (struct usb_serial_port *port)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
int actually_throttled;
|
|
unsigned long flags;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
actually_throttled = info->flags & ACTUALLY_THROTTLED;
|
|
info->flags &= ~(THROTTLED | ACTUALLY_THROTTLED);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
if (actually_throttled)
|
|
rx_data_softint(&info->rx_work);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* Connect Tech's White Heat callback routines
|
|
*****************************************************************************/
|
|
static void command_port_write_callback (struct urb *urb)
|
|
{
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
if (urb->status) {
|
|
dbg ("nonzero urb status: %d", urb->status);
|
|
return;
|
|
}
|
|
}
|
|
|
|
|
|
static void command_port_read_callback (struct urb *urb)
|
|
{
|
|
struct usb_serial_port *command_port = (struct usb_serial_port *)urb->context;
|
|
struct whiteheat_command_private *command_info;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
int result;
|
|
unsigned long flags;
|
|
|
|
dbg("%s", __FUNCTION__);
|
|
|
|
if (urb->status) {
|
|
dbg("%s - nonzero urb status: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
}
|
|
|
|
usb_serial_debug_data(debug, &command_port->dev, __FUNCTION__, urb->actual_length, data);
|
|
|
|
command_info = usb_get_serial_port_data(command_port);
|
|
if (!command_info) {
|
|
dbg ("%s - command_info is NULL, exiting.", __FUNCTION__);
|
|
return;
|
|
}
|
|
spin_lock_irqsave(&command_info->lock, flags);
|
|
|
|
if (data[0] == WHITEHEAT_CMD_COMPLETE) {
|
|
command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
|
|
wake_up_interruptible(&command_info->wait_command);
|
|
} else if (data[0] == WHITEHEAT_CMD_FAILURE) {
|
|
command_info->command_finished = WHITEHEAT_CMD_FAILURE;
|
|
wake_up_interruptible(&command_info->wait_command);
|
|
} else if (data[0] == WHITEHEAT_EVENT) {
|
|
/* These are unsolicited reports from the firmware, hence no waiting command to wakeup */
|
|
dbg("%s - event received", __FUNCTION__);
|
|
} else if (data[0] == WHITEHEAT_GET_DTR_RTS) {
|
|
memcpy(command_info->result_buffer, &data[1], urb->actual_length - 1);
|
|
command_info->command_finished = WHITEHEAT_CMD_COMPLETE;
|
|
wake_up_interruptible(&command_info->wait_command);
|
|
} else {
|
|
dbg("%s - bad reply from firmware", __FUNCTION__);
|
|
}
|
|
|
|
/* Continue trying to always read */
|
|
command_port->read_urb->dev = command_port->serial->dev;
|
|
result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
|
|
spin_unlock_irqrestore(&command_info->lock, flags);
|
|
if (result)
|
|
dbg("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
|
|
}
|
|
|
|
|
|
static void whiteheat_read_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
|
struct whiteheat_urb_wrap *wrap;
|
|
unsigned char *data = urb->transfer_buffer;
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock(&info->lock);
|
|
wrap = urb_to_wrap(urb, &info->rx_urbs_submitted);
|
|
if (!wrap) {
|
|
spin_unlock(&info->lock);
|
|
err("%s - Not my urb!", __FUNCTION__);
|
|
return;
|
|
}
|
|
list_del(&wrap->list);
|
|
spin_unlock(&info->lock);
|
|
|
|
if (urb->status) {
|
|
dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
|
|
spin_lock(&info->lock);
|
|
list_add(&wrap->list, &info->rx_urbs_free);
|
|
spin_unlock(&info->lock);
|
|
return;
|
|
}
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data);
|
|
|
|
spin_lock(&info->lock);
|
|
list_add_tail(&wrap->list, &info->rx_urb_q);
|
|
if (info->flags & THROTTLED) {
|
|
info->flags |= ACTUALLY_THROTTLED;
|
|
spin_unlock(&info->lock);
|
|
return;
|
|
}
|
|
spin_unlock(&info->lock);
|
|
|
|
schedule_work(&info->rx_work);
|
|
}
|
|
|
|
|
|
static void whiteheat_write_callback(struct urb *urb)
|
|
{
|
|
struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct whiteheat_urb_wrap *wrap;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
spin_lock(&info->lock);
|
|
wrap = urb_to_wrap(urb, &info->tx_urbs_submitted);
|
|
if (!wrap) {
|
|
spin_unlock(&info->lock);
|
|
err("%s - Not my urb!", __FUNCTION__);
|
|
return;
|
|
}
|
|
list_move(&wrap->list, &info->tx_urbs_free);
|
|
spin_unlock(&info->lock);
|
|
|
|
if (urb->status) {
|
|
dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
|
|
return;
|
|
}
|
|
|
|
usb_serial_port_softint(port);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* Connect Tech's White Heat firmware interface
|
|
*****************************************************************************/
|
|
static int firm_send_command (struct usb_serial_port *port, __u8 command, __u8 *data, __u8 datasize)
|
|
{
|
|
struct usb_serial_port *command_port;
|
|
struct whiteheat_command_private *command_info;
|
|
struct whiteheat_private *info;
|
|
__u8 *transfer_buffer;
|
|
int retval = 0;
|
|
unsigned long flags;
|
|
|
|
dbg("%s - command %d", __FUNCTION__, command);
|
|
|
|
command_port = port->serial->port[COMMAND_PORT];
|
|
command_info = usb_get_serial_port_data(command_port);
|
|
spin_lock_irqsave(&command_info->lock, flags);
|
|
command_info->command_finished = FALSE;
|
|
|
|
transfer_buffer = (__u8 *)command_port->write_urb->transfer_buffer;
|
|
transfer_buffer[0] = command;
|
|
memcpy (&transfer_buffer[1], data, datasize);
|
|
command_port->write_urb->transfer_buffer_length = datasize + 1;
|
|
command_port->write_urb->dev = port->serial->dev;
|
|
retval = usb_submit_urb (command_port->write_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
dbg("%s - submit urb failed", __FUNCTION__);
|
|
goto exit;
|
|
}
|
|
spin_unlock_irqrestore(&command_info->lock, flags);
|
|
|
|
/* wait for the command to complete */
|
|
wait_event_interruptible_timeout(command_info->wait_command,
|
|
(command_info->command_finished != FALSE), COMMAND_TIMEOUT);
|
|
|
|
spin_lock_irqsave(&command_info->lock, flags);
|
|
|
|
if (command_info->command_finished == FALSE) {
|
|
dbg("%s - command timed out.", __FUNCTION__);
|
|
retval = -ETIMEDOUT;
|
|
goto exit;
|
|
}
|
|
|
|
if (command_info->command_finished == WHITEHEAT_CMD_FAILURE) {
|
|
dbg("%s - command failed.", __FUNCTION__);
|
|
retval = -EIO;
|
|
goto exit;
|
|
}
|
|
|
|
if (command_info->command_finished == WHITEHEAT_CMD_COMPLETE) {
|
|
dbg("%s - command completed.", __FUNCTION__);
|
|
switch (command) {
|
|
case WHITEHEAT_GET_DTR_RTS:
|
|
info = usb_get_serial_port_data(port);
|
|
memcpy(&info->mcr, command_info->result_buffer, sizeof(struct whiteheat_dr_info));
|
|
break;
|
|
}
|
|
}
|
|
|
|
exit:
|
|
spin_unlock_irqrestore(&command_info->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static int firm_open(struct usb_serial_port *port) {
|
|
struct whiteheat_simple open_command;
|
|
|
|
open_command.port = port->number - port->serial->minor + 1;
|
|
return firm_send_command(port, WHITEHEAT_OPEN, (__u8 *)&open_command, sizeof(open_command));
|
|
}
|
|
|
|
|
|
static int firm_close(struct usb_serial_port *port) {
|
|
struct whiteheat_simple close_command;
|
|
|
|
close_command.port = port->number - port->serial->minor + 1;
|
|
return firm_send_command(port, WHITEHEAT_CLOSE, (__u8 *)&close_command, sizeof(close_command));
|
|
}
|
|
|
|
|
|
static int firm_setup_port(struct usb_serial_port *port) {
|
|
struct whiteheat_port_settings port_settings;
|
|
unsigned int cflag = port->tty->termios->c_cflag;
|
|
|
|
port_settings.port = port->number + 1;
|
|
|
|
/* get the byte size */
|
|
switch (cflag & CSIZE) {
|
|
case CS5: port_settings.bits = 5; break;
|
|
case CS6: port_settings.bits = 6; break;
|
|
case CS7: port_settings.bits = 7; break;
|
|
default:
|
|
case CS8: port_settings.bits = 8; break;
|
|
}
|
|
dbg("%s - data bits = %d", __FUNCTION__, port_settings.bits);
|
|
|
|
/* determine the parity */
|
|
if (cflag & PARENB)
|
|
if (cflag & CMSPAR)
|
|
if (cflag & PARODD)
|
|
port_settings.parity = WHITEHEAT_PAR_MARK;
|
|
else
|
|
port_settings.parity = WHITEHEAT_PAR_SPACE;
|
|
else
|
|
if (cflag & PARODD)
|
|
port_settings.parity = WHITEHEAT_PAR_ODD;
|
|
else
|
|
port_settings.parity = WHITEHEAT_PAR_EVEN;
|
|
else
|
|
port_settings.parity = WHITEHEAT_PAR_NONE;
|
|
dbg("%s - parity = %c", __FUNCTION__, port_settings.parity);
|
|
|
|
/* figure out the stop bits requested */
|
|
if (cflag & CSTOPB)
|
|
port_settings.stop = 2;
|
|
else
|
|
port_settings.stop = 1;
|
|
dbg("%s - stop bits = %d", __FUNCTION__, port_settings.stop);
|
|
|
|
/* figure out the flow control settings */
|
|
if (cflag & CRTSCTS)
|
|
port_settings.hflow = (WHITEHEAT_HFLOW_CTS | WHITEHEAT_HFLOW_RTS);
|
|
else
|
|
port_settings.hflow = WHITEHEAT_HFLOW_NONE;
|
|
dbg("%s - hardware flow control = %s %s %s %s", __FUNCTION__,
|
|
(port_settings.hflow & WHITEHEAT_HFLOW_CTS) ? "CTS" : "",
|
|
(port_settings.hflow & WHITEHEAT_HFLOW_RTS) ? "RTS" : "",
|
|
(port_settings.hflow & WHITEHEAT_HFLOW_DSR) ? "DSR" : "",
|
|
(port_settings.hflow & WHITEHEAT_HFLOW_DTR) ? "DTR" : "");
|
|
|
|
/* determine software flow control */
|
|
if (I_IXOFF(port->tty))
|
|
port_settings.sflow = WHITEHEAT_SFLOW_RXTX;
|
|
else
|
|
port_settings.sflow = WHITEHEAT_SFLOW_NONE;
|
|
dbg("%s - software flow control = %c", __FUNCTION__, port_settings.sflow);
|
|
|
|
port_settings.xon = START_CHAR(port->tty);
|
|
port_settings.xoff = STOP_CHAR(port->tty);
|
|
dbg("%s - XON = %2x, XOFF = %2x", __FUNCTION__, port_settings.xon, port_settings.xoff);
|
|
|
|
/* get the baud rate wanted */
|
|
port_settings.baud = tty_get_baud_rate(port->tty);
|
|
dbg("%s - baud rate = %d", __FUNCTION__, port_settings.baud);
|
|
|
|
/* handle any settings that aren't specified in the tty structure */
|
|
port_settings.lloop = 0;
|
|
|
|
/* now send the message to the device */
|
|
return firm_send_command(port, WHITEHEAT_SETUP_PORT, (__u8 *)&port_settings, sizeof(port_settings));
|
|
}
|
|
|
|
|
|
static int firm_set_rts(struct usb_serial_port *port, __u8 onoff) {
|
|
struct whiteheat_set_rdb rts_command;
|
|
|
|
rts_command.port = port->number - port->serial->minor + 1;
|
|
rts_command.state = onoff;
|
|
return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&rts_command, sizeof(rts_command));
|
|
}
|
|
|
|
|
|
static int firm_set_dtr(struct usb_serial_port *port, __u8 onoff) {
|
|
struct whiteheat_set_rdb dtr_command;
|
|
|
|
dtr_command.port = port->number - port->serial->minor + 1;
|
|
dtr_command.state = onoff;
|
|
return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&dtr_command, sizeof(dtr_command));
|
|
}
|
|
|
|
|
|
static int firm_set_break(struct usb_serial_port *port, __u8 onoff) {
|
|
struct whiteheat_set_rdb break_command;
|
|
|
|
break_command.port = port->number - port->serial->minor + 1;
|
|
break_command.state = onoff;
|
|
return firm_send_command(port, WHITEHEAT_SET_RTS, (__u8 *)&break_command, sizeof(break_command));
|
|
}
|
|
|
|
|
|
static int firm_purge(struct usb_serial_port *port, __u8 rxtx) {
|
|
struct whiteheat_purge purge_command;
|
|
|
|
purge_command.port = port->number - port->serial->minor + 1;
|
|
purge_command.what = rxtx;
|
|
return firm_send_command(port, WHITEHEAT_PURGE, (__u8 *)&purge_command, sizeof(purge_command));
|
|
}
|
|
|
|
|
|
static int firm_get_dtr_rts(struct usb_serial_port *port) {
|
|
struct whiteheat_simple get_dr_command;
|
|
|
|
get_dr_command.port = port->number - port->serial->minor + 1;
|
|
return firm_send_command(port, WHITEHEAT_GET_DTR_RTS, (__u8 *)&get_dr_command, sizeof(get_dr_command));
|
|
}
|
|
|
|
|
|
static int firm_report_tx_done(struct usb_serial_port *port) {
|
|
struct whiteheat_simple close_command;
|
|
|
|
close_command.port = port->number - port->serial->minor + 1;
|
|
return firm_send_command(port, WHITEHEAT_REPORT_TX_DONE, (__u8 *)&close_command, sizeof(close_command));
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* Connect Tech's White Heat utility functions
|
|
*****************************************************************************/
|
|
static int start_command_port(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *command_port;
|
|
struct whiteheat_command_private *command_info;
|
|
unsigned long flags;
|
|
int retval = 0;
|
|
|
|
command_port = serial->port[COMMAND_PORT];
|
|
command_info = usb_get_serial_port_data(command_port);
|
|
spin_lock_irqsave(&command_info->lock, flags);
|
|
if (!command_info->port_running) {
|
|
/* Work around HCD bugs */
|
|
usb_clear_halt(serial->dev, command_port->read_urb->pipe);
|
|
|
|
command_port->read_urb->dev = serial->dev;
|
|
retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
|
|
if (retval) {
|
|
err("%s - failed submitting read urb, error %d", __FUNCTION__, retval);
|
|
goto exit;
|
|
}
|
|
}
|
|
command_info->port_running++;
|
|
|
|
exit:
|
|
spin_unlock_irqrestore(&command_info->lock, flags);
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void stop_command_port(struct usb_serial *serial)
|
|
{
|
|
struct usb_serial_port *command_port;
|
|
struct whiteheat_command_private *command_info;
|
|
unsigned long flags;
|
|
|
|
command_port = serial->port[COMMAND_PORT];
|
|
command_info = usb_get_serial_port_data(command_port);
|
|
spin_lock_irqsave(&command_info->lock, flags);
|
|
command_info->port_running--;
|
|
if (!command_info->port_running)
|
|
usb_kill_urb(command_port->read_urb);
|
|
spin_unlock_irqrestore(&command_info->lock, flags);
|
|
}
|
|
|
|
|
|
static int start_port_read(struct usb_serial_port *port)
|
|
{
|
|
struct whiteheat_private *info = usb_get_serial_port_data(port);
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct urb *urb;
|
|
int retval = 0;
|
|
unsigned long flags;
|
|
struct list_head *tmp;
|
|
struct list_head *tmp2;
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urbs_free) {
|
|
list_del(tmp);
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
urb->dev = port->serial->dev;
|
|
retval = usb_submit_urb(urb, GFP_KERNEL);
|
|
if (retval) {
|
|
list_add(tmp, &info->rx_urbs_free);
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urbs_submitted) {
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
usb_kill_urb(urb);
|
|
list_move(tmp, &info->rx_urbs_free);
|
|
}
|
|
break;
|
|
}
|
|
list_add(tmp, &info->rx_urbs_submitted);
|
|
}
|
|
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
return retval;
|
|
}
|
|
|
|
|
|
static struct whiteheat_urb_wrap *urb_to_wrap(struct urb* urb, struct list_head *head)
|
|
{
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct list_head *tmp;
|
|
|
|
list_for_each(tmp, head) {
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
if (wrap->urb == urb)
|
|
return wrap;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static struct list_head *list_first(struct list_head *head)
|
|
{
|
|
return head->next;
|
|
}
|
|
|
|
|
|
static void rx_data_softint(struct work_struct *work)
|
|
{
|
|
struct whiteheat_private *info =
|
|
container_of(work, struct whiteheat_private, rx_work);
|
|
struct usb_serial_port *port = info->port;
|
|
struct tty_struct *tty = port->tty;
|
|
struct whiteheat_urb_wrap *wrap;
|
|
struct urb *urb;
|
|
unsigned long flags;
|
|
struct list_head *tmp;
|
|
struct list_head *tmp2;
|
|
int result;
|
|
int sent = 0;
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
if (info->flags & THROTTLED) {
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
return;
|
|
}
|
|
|
|
list_for_each_safe(tmp, tmp2, &info->rx_urb_q) {
|
|
list_del(tmp);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
|
|
urb = wrap->urb;
|
|
|
|
if (tty && urb->actual_length) {
|
|
int len = tty_buffer_request_room(tty, urb->actual_length);
|
|
/* This stuff can go away now I suspect */
|
|
if (unlikely(len < urb->actual_length)) {
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_add(tmp, &info->rx_urb_q);
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
tty_flip_buffer_push(tty);
|
|
schedule_work(&info->rx_work);
|
|
return;
|
|
}
|
|
tty_insert_flip_string(tty, urb->transfer_buffer, len);
|
|
sent += len;
|
|
}
|
|
|
|
urb->dev = port->serial->dev;
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result) {
|
|
err("%s - failed resubmitting read urb, error %d", __FUNCTION__, result);
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_add(tmp, &info->rx_urbs_free);
|
|
continue;
|
|
}
|
|
|
|
spin_lock_irqsave(&info->lock, flags);
|
|
list_add(tmp, &info->rx_urbs_submitted);
|
|
}
|
|
spin_unlock_irqrestore(&info->lock, flags);
|
|
|
|
if (sent)
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
* Connect Tech's White Heat module functions
|
|
*****************************************************************************/
|
|
static int __init whiteheat_init (void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&whiteheat_fake_device);
|
|
if (retval)
|
|
goto failed_fake_register;
|
|
retval = usb_serial_register(&whiteheat_device);
|
|
if (retval)
|
|
goto failed_device_register;
|
|
retval = usb_register(&whiteheat_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
info(DRIVER_DESC " " DRIVER_VERSION);
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&whiteheat_device);
|
|
failed_device_register:
|
|
usb_serial_deregister(&whiteheat_fake_device);
|
|
failed_fake_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit whiteheat_exit (void)
|
|
{
|
|
usb_deregister (&whiteheat_driver);
|
|
usb_serial_deregister (&whiteheat_fake_device);
|
|
usb_serial_deregister (&whiteheat_device);
|
|
}
|
|
|
|
|
|
module_init(whiteheat_init);
|
|
module_exit(whiteheat_exit);
|
|
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(urb_pool_size, int, 0);
|
|
MODULE_PARM_DESC(urb_pool_size, "Number of urbs to use for buffering");
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|