2005-04-16 15:20:36 -07:00
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/*
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* KOBIL USB Smart Card Terminal Driver
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*
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* Copyright (C) 2002 KOBIL Systems GmbH
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* Author: Thomas Wahrenbruch
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*
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* Contact: linuxusb@kobil.de
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*
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* This program is largely derived from work by the linux-usb group
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* and associated source files. Please see the usb/serial files for
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* individual credits and copyrights.
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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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* Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
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* patience.
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*
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* Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
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* (Adapter K), B1 Professional and KAAN Professional (Adapter B)
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*
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* (21/05/2004) tw
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* Fix bug with P'n'P readers
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*
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* (28/05/2003) tw
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* Add support for KAAN SIM
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*
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* (12/09/2002) tw
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* Adapted to 2.5.
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*
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* (11/08/2002) tw
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* Initial version.
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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 <linux/usb.h>
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2006-07-11 21:22:58 -07:00
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#include <linux/usb/serial.h>
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2005-04-16 15:20:36 -07:00
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#include <linux/ioctl.h>
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#include "kobil_sct.h"
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static int debug;
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/* Version Information */
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#define DRIVER_VERSION "21/05/2004"
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#define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
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#define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
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#define KOBIL_VENDOR_ID 0x0D46
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#define KOBIL_ADAPTER_B_PRODUCT_ID 0x2011
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#define KOBIL_ADAPTER_K_PRODUCT_ID 0x2012
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#define KOBIL_USBTWIN_PRODUCT_ID 0x0078
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#define KOBIL_KAAN_SIM_PRODUCT_ID 0x0081
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#define KOBIL_TIMEOUT 500
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#define KOBIL_BUF_LENGTH 300
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/* Function prototypes */
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static int kobil_startup (struct usb_serial *serial);
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static void kobil_shutdown (struct usb_serial *serial);
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static int kobil_open (struct usb_serial_port *port, struct file *filp);
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static void kobil_close (struct usb_serial_port *port, struct file *filp);
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static int kobil_write (struct usb_serial_port *port,
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const unsigned char *buf, int count);
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static int kobil_write_room(struct usb_serial_port *port);
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static int kobil_ioctl(struct usb_serial_port *port, struct file *file,
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unsigned int cmd, unsigned long arg);
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static int kobil_tiocmget(struct usb_serial_port *port, struct file *file);
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static int kobil_tiocmset(struct usb_serial_port *port, struct file *file,
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unsigned int set, unsigned int clear);
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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 06:55:46 -07:00
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static void kobil_read_int_callback( struct urb *urb );
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static void kobil_write_callback( struct urb *purb );
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2005-04-16 15:20:36 -07:00
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
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{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
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{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
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{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, id_table);
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static struct usb_driver kobil_driver = {
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.name = "kobil",
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.probe = usb_serial_probe,
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.disconnect = usb_serial_disconnect,
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.id_table = id_table,
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2005-11-16 14:41:28 -07:00
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.no_dynamic_id = 1,
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2005-04-16 15:20:36 -07:00
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};
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2005-06-20 21:15:16 -07:00
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static struct usb_serial_driver kobil_device = {
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2005-06-20 21:15:16 -07:00
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.driver = {
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.owner = THIS_MODULE,
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2005-06-20 21:15:16 -07:00
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.name = "kobil",
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2005-06-20 21:15:16 -07:00
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},
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2005-06-20 21:15:16 -07:00
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.description = "KOBIL USB smart card terminal",
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2005-04-16 15:20:36 -07:00
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.id_table = id_table,
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.num_interrupt_in = NUM_DONT_CARE,
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.num_bulk_in = 0,
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.num_bulk_out = 0,
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.num_ports = 1,
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.attach = kobil_startup,
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.shutdown = kobil_shutdown,
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.ioctl = kobil_ioctl,
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.tiocmget = kobil_tiocmget,
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.tiocmset = kobil_tiocmset,
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.open = kobil_open,
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.close = kobil_close,
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.write = kobil_write,
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.write_room = kobil_write_room,
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.read_int_callback = kobil_read_int_callback,
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};
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struct kobil_private {
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int write_int_endpoint_address;
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int read_int_endpoint_address;
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unsigned char buf[KOBIL_BUF_LENGTH]; // buffer for the APDU to send
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int filled; // index of the last char in buf
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int cur_pos; // index of the next char to send in buf
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__u16 device_type;
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int line_state;
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2006-12-08 03:38:45 -07:00
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struct ktermios internal_termios;
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2005-04-16 15:20:36 -07:00
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};
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static int kobil_startup (struct usb_serial *serial)
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{
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int i;
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struct kobil_private *priv;
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struct usb_device *pdev;
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struct usb_host_config *actconfig;
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struct usb_interface *interface;
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struct usb_host_interface *altsetting;
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struct usb_host_endpoint *endpoint;
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priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
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if (!priv){
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return -ENOMEM;
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}
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priv->filled = 0;
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priv->cur_pos = 0;
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priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
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priv->line_state = 0;
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switch (priv->device_type){
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case KOBIL_ADAPTER_B_PRODUCT_ID:
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printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
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break;
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case KOBIL_ADAPTER_K_PRODUCT_ID:
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printk(KERN_DEBUG "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
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break;
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case KOBIL_USBTWIN_PRODUCT_ID:
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printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
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break;
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case KOBIL_KAAN_SIM_PRODUCT_ID:
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printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
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break;
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}
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usb_set_serial_port_data(serial->port[0], priv);
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// search for the necessary endpoints
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pdev = serial->dev;
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actconfig = pdev->actconfig;
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interface = actconfig->interface[0];
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altsetting = interface->cur_altsetting;
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endpoint = altsetting->endpoint;
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for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
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endpoint = &altsetting->endpoint[i];
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2006-10-26 09:02:53 -07:00
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if (usb_endpoint_is_int_out(&endpoint->desc)) {
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2005-04-16 15:20:36 -07:00
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dbg("%s Found interrupt out endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
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priv->write_int_endpoint_address = endpoint->desc.bEndpointAddress;
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}
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2006-10-26 09:02:53 -07:00
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if (usb_endpoint_is_int_in(&endpoint->desc)) {
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2005-04-16 15:20:36 -07:00
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dbg("%s Found interrupt in endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
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priv->read_int_endpoint_address = endpoint->desc.bEndpointAddress;
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}
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}
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return 0;
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}
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static void kobil_shutdown (struct usb_serial *serial)
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{
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int i;
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dbg("%s - port %d", __FUNCTION__, serial->port[0]->number);
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for (i=0; i < serial->num_ports; ++i) {
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while (serial->port[i]->open_count > 0) {
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kobil_close (serial->port[i], NULL);
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}
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kfree(usb_get_serial_port_data(serial->port[i]));
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usb_set_serial_port_data(serial->port[i], NULL);
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}
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}
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static int kobil_open (struct usb_serial_port *port, struct file *filp)
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{
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int i, result = 0;
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struct kobil_private *priv;
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unsigned char *transfer_buffer;
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int transfer_buffer_length = 8;
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int write_urb_transfer_buffer_length = 8;
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dbg("%s - port %d", __FUNCTION__, port->number);
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priv = usb_get_serial_port_data(port);
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priv->line_state = 0;
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// someone sets the dev to 0 if the close method has been called
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port->interrupt_in_urb->dev = port->serial->dev;
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/* force low_latency on so that our tty_push actually forces
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* the data through, otherwise it is scheduled, and with high
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* data rates (like with OHCI) data can get lost.
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*/
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port->tty->low_latency = 1;
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// without this, every push_tty_char is echoed :-(
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port->tty->termios->c_lflag = 0;
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port->tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
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port->tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
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port->tty->termios->c_oflag &= ~ONLCR; // do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D)
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// set up internal termios structure
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priv->internal_termios.c_iflag = port->tty->termios->c_iflag;
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priv->internal_termios.c_oflag = port->tty->termios->c_oflag;
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priv->internal_termios.c_cflag = port->tty->termios->c_cflag;
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priv->internal_termios.c_lflag = port->tty->termios->c_lflag;
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for (i=0; i<NCCS; i++) {
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priv->internal_termios.c_cc[i] = port->tty->termios->c_cc[i];
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}
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// allocate memory for transfer buffer
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2006-02-27 13:29:43 -07:00
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transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
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2005-04-16 15:20:36 -07:00
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if (! transfer_buffer) {
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return -ENOMEM;
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}
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// allocate write_urb
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if (!port->write_urb) {
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dbg("%s - port %d Allocating port->write_urb", __FUNCTION__, port->number);
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port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!port->write_urb) {
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dbg("%s - port %d usb_alloc_urb failed", __FUNCTION__, port->number);
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kfree(transfer_buffer);
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return -ENOMEM;
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}
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}
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// allocate memory for write_urb transfer buffer
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2006-12-13 01:35:56 -07:00
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port->write_urb->transfer_buffer = kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
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2005-04-16 15:20:36 -07:00
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if (! port->write_urb->transfer_buffer) {
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kfree(transfer_buffer);
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usb_free_urb(port->write_urb);
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port->write_urb = NULL;
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return -ENOMEM;
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}
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// get hardware version
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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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SUSBCRequest_GetMisc,
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USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
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SUSBCR_MSC_GetHWVersion,
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0,
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transfer_buffer,
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transfer_buffer_length,
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KOBIL_TIMEOUT
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);
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dbg("%s - port %d Send get_HW_version URB returns: %i", __FUNCTION__, port->number, result);
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dbg("Harware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
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// get firmware version
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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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SUSBCRequest_GetMisc,
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USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
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SUSBCR_MSC_GetFWVersion,
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0,
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transfer_buffer,
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transfer_buffer_length,
|
|
|
|
KOBIL_TIMEOUT
|
|
|
|
);
|
|
|
|
dbg("%s - port %d Send get_FW_version URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
dbg("Firmware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
|
|
|
|
|
|
|
|
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
|
|
|
|
// Setting Baudrate, Parity and Stopbits
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_SetBaudRateParityAndStopBits,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity | SUSBCR_SPASB_1StopBit,
|
|
|
|
0,
|
|
|
|
transfer_buffer,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT
|
|
|
|
);
|
|
|
|
dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
|
|
|
|
// reset all queues
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_Misc,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
SUSBCR_MSC_ResetAllQueues,
|
|
|
|
0,
|
|
|
|
transfer_buffer,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT
|
|
|
|
);
|
|
|
|
dbg("%s - port %d Send reset_all_queues URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
}
|
|
|
|
if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
|
|
|
|
priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
|
|
|
|
// start reading (Adapter B 'cause PNP string)
|
|
|
|
result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC );
|
|
|
|
dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(transfer_buffer);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void kobil_close (struct usb_serial_port *port, struct file *filp)
|
|
|
|
{
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
|
|
|
|
if (port->write_urb) {
|
|
|
|
usb_kill_urb(port->write_urb);
|
|
|
|
usb_free_urb( port->write_urb );
|
|
|
|
port->write_urb = NULL;
|
|
|
|
}
|
2006-11-08 07:36:38 -07:00
|
|
|
usb_kill_urb(port->interrupt_in_urb);
|
2005-04-16 15:20:36 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 06:55:46 -07:00
|
|
|
static void kobil_read_int_callback( struct urb *purb)
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
int result;
|
|
|
|
struct usb_serial_port *port = (struct usb_serial_port *) purb->context;
|
|
|
|
struct tty_struct *tty;
|
|
|
|
unsigned char *data = purb->transfer_buffer;
|
|
|
|
// char *dbg_data;
|
|
|
|
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
|
|
|
|
if (purb->status) {
|
|
|
|
dbg("%s - port %d Read int status not zero: %d", __FUNCTION__, port->number, purb->status);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
tty = port->tty;
|
|
|
|
if (purb->actual_length) {
|
|
|
|
|
|
|
|
// BEGIN DEBUG
|
|
|
|
/*
|
2006-02-27 13:29:43 -07:00
|
|
|
dbg_data = kzalloc((3 * purb->actual_length + 10) * sizeof(char), GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (! dbg_data) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
for (i = 0; i < purb->actual_length; i++) {
|
|
|
|
sprintf(dbg_data +3*i, "%02X ", data[i]);
|
|
|
|
}
|
|
|
|
dbg(" <-- %s", dbg_data );
|
|
|
|
kfree(dbg_data);
|
|
|
|
*/
|
|
|
|
// END DEBUG
|
|
|
|
|
[PATCH] TTY layer buffering revamp
The API and code have been through various bits of initial review by
serial driver people but they definitely need to live somewhere for a
while so the unconverted drivers can get knocked into shape, existing
drivers that have been updated can be better tuned and bugs whacked out.
This replaces the tty flip buffers with kmalloc objects in rings. In the
normal situation for an IRQ driven serial port at typical speeds the
behaviour is pretty much the same, two buffers end up allocated and the
kernel cycles between them as before.
When there are delays or at high speed we now behave far better as the
buffer pool can grow a bit rather than lose characters. This also means
that we can operate at higher speeds reliably.
For drivers that receive characters in blocks (DMA based, USB and
especially virtualisation) the layer allows a lot of driver specific
code that works around the tty layer with private secondary queues to be
removed. The IBM folks need this sort of layer, the smart serial port
people do, the virtualisers do (because a virtualised tty typically
operates at infinite speed rather than emulating 9600 baud).
Finally many drivers had invalid and unsafe attempts to avoid buffer
overflows by directly invoking tty methods extracted out of the innards
of work queue structs. These are no longer needed and all go away. That
fixes various random hangs with serial ports on overflow.
The other change in here is to optimise the receive_room path that is
used by some callers. It turns out that only one ldisc uses receive room
except asa constant and it updates it far far less than the value is
read. We thus make it a variable not a function call.
I expect the code to contain bugs due to the size alone but I'll be
watching and squashing them and feeding out new patches as it goes.
Because the buffers now dynamically expand you should only run out of
buffering when the kernel runs out of memory for real. That means a lot of
the horrible hacks high performance drivers used to do just aren't needed any
more.
Description:
tty_insert_flip_char is an old API and continues to work as before, as does
tty_flip_buffer_push() [this is why many drivers dont need modification]. It
does now also return the number of chars inserted
There are also
tty_buffer_request_room(tty, len)
which asks for a buffer block of the length requested and returns the space
found. This improves efficiency with hardware that knows how much to
transfer.
and tty_insert_flip_string_flags(tty, str, flags, len)
to insert a string of characters and flags
For a smart interface the usual code is
len = tty_request_buffer_room(tty, amount_hardware_says);
tty_insert_flip_string(tty, buffer_from_card, len);
More description!
At the moment tty buffers are attached directly to the tty. This is causing a
lot of the problems related to tty layer locking, also problems at high speed
and also with bursty data (such as occurs in virtualised environments)
I'm working on ripping out the flip buffers and replacing them with a pool of
dynamically allocated buffers. This allows both for old style "byte I/O"
devices and also helps virtualisation and smart devices where large blocks of
data suddenely materialise and need storing.
So far so good. Lots of drivers reference tty->flip.*. Several of them also
call directly and unsafely into function pointers it provides. This will all
break. Most drivers can use tty_insert_flip_char which can be kept as an API
but others need more.
At the moment I've added the following interfaces, if people think more will
be needed now is a good time to say
int tty_buffer_request_room(tty, size)
Try and ensure at least size bytes are available, returns actual room (may be
zero). At the moment it just uses the flipbuf space but that will change.
Repeated calls without characters being added are not cumulative. (ie if you
call it with 1, 1, 1, and then 4 you'll have four characters of space. The
other functions will also try and grow buffers in future but this will be a
more efficient way when you know block sizes.
int tty_insert_flip_char(tty, ch, flag)
As before insert a character if there is room. Now returns 1 for success, 0
for failure.
int tty_insert_flip_string(tty, str, len)
Insert a block of non error characters. Returns the number inserted.
int tty_prepare_flip_string(tty, strptr, len)
Adjust the buffer to allow len characters to be added. Returns a buffer
pointer in strptr and the length available. This allows for hardware that
needs to use functions like insl or mencpy_fromio.
Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: John Hawkes <hawkes@sgi.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-09 21:54:13 -07:00
|
|
|
tty_buffer_request_room(tty, purb->actual_length);
|
|
|
|
tty_insert_flip_string(tty, data, purb->actual_length);
|
2005-04-16 15:20:36 -07:00
|
|
|
tty_flip_buffer_push(tty);
|
|
|
|
}
|
|
|
|
|
|
|
|
// someone sets the dev to 0 if the close method has been called
|
|
|
|
port->interrupt_in_urb->dev = port->serial->dev;
|
|
|
|
|
|
|
|
result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC );
|
|
|
|
dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.
The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around. On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).
Where appropriate, an arch may override the generic storage facility and do
something different with the variable. On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.
Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions. Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller. A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.
I've build this code with allyesconfig for x86_64 and i386. I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.
This will affect all archs. Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:
struct pt_regs *old_regs = set_irq_regs(regs);
And put the old one back at the end:
set_irq_regs(old_regs);
Don't pass regs through to generic_handle_irq() or __do_IRQ().
In timer_interrupt(), this sort of change will be necessary:
- update_process_times(user_mode(regs));
- profile_tick(CPU_PROFILING, regs);
+ update_process_times(user_mode(get_irq_regs()));
+ profile_tick(CPU_PROFILING);
I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().
Some notes on the interrupt handling in the drivers:
(*) input_dev() is now gone entirely. The regs pointer is no longer stored in
the input_dev struct.
(*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does
something different depending on whether it's been supplied with a regs
pointer or not.
(*) Various IRQ handler function pointers have been moved to type
irq_handler_t.
Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 06:55:46 -07:00
|
|
|
static void kobil_write_callback( struct urb *purb )
|
2005-04-16 15:20:36 -07:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int kobil_write (struct usb_serial_port *port,
|
|
|
|
const unsigned char *buf, int count)
|
|
|
|
{
|
|
|
|
int length = 0;
|
|
|
|
int result = 0;
|
|
|
|
int todo = 0;
|
|
|
|
struct kobil_private * priv;
|
|
|
|
|
|
|
|
if (count == 0) {
|
|
|
|
dbg("%s - port %d write request of 0 bytes", __FUNCTION__, port->number);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
|
|
|
|
if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
|
|
|
|
dbg("%s - port %d Error: write request bigger than buffer size", __FUNCTION__, port->number);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Copy data to buffer
|
|
|
|
memcpy (priv->buf + priv->filled, buf, count);
|
|
|
|
|
|
|
|
usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, priv->buf + priv->filled);
|
|
|
|
|
|
|
|
priv->filled = priv->filled + count;
|
|
|
|
|
|
|
|
|
|
|
|
// only send complete block. TWIN, KAAN SIM and adapter K use the same protocol.
|
|
|
|
if ( ((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
|
|
|
|
((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4))) ) {
|
|
|
|
|
|
|
|
// stop reading (except TWIN and KAAN SIM)
|
|
|
|
if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) )
|
|
|
|
usb_kill_urb(port->interrupt_in_urb);
|
|
|
|
|
|
|
|
todo = priv->filled - priv->cur_pos;
|
|
|
|
|
|
|
|
while(todo > 0) {
|
|
|
|
// max 8 byte in one urb (endpoint size)
|
|
|
|
length = (todo < 8) ? todo : 8;
|
|
|
|
// copy data to transfer buffer
|
|
|
|
memcpy(port->write_urb->transfer_buffer, priv->buf + priv->cur_pos, length );
|
|
|
|
usb_fill_int_urb( port->write_urb,
|
|
|
|
port->serial->dev,
|
|
|
|
usb_sndintpipe(port->serial->dev, priv->write_int_endpoint_address),
|
|
|
|
port->write_urb->transfer_buffer,
|
|
|
|
length,
|
|
|
|
kobil_write_callback,
|
|
|
|
port,
|
|
|
|
8
|
|
|
|
);
|
|
|
|
|
|
|
|
priv->cur_pos = priv->cur_pos + length;
|
|
|
|
result = usb_submit_urb( port->write_urb, GFP_NOIO );
|
|
|
|
dbg("%s - port %d Send write URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
todo = priv->filled - priv->cur_pos;
|
|
|
|
|
|
|
|
if (todo > 0) {
|
|
|
|
msleep(24);
|
|
|
|
}
|
|
|
|
|
|
|
|
} // end while
|
|
|
|
|
|
|
|
priv->filled = 0;
|
|
|
|
priv->cur_pos = 0;
|
|
|
|
|
|
|
|
// someone sets the dev to 0 if the close method has been called
|
|
|
|
port->interrupt_in_urb->dev = port->serial->dev;
|
|
|
|
|
|
|
|
// start reading (except TWIN and KAAN SIM)
|
|
|
|
if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
|
|
|
|
// someone sets the dev to 0 if the close method has been called
|
|
|
|
port->interrupt_in_urb->dev = port->serial->dev;
|
|
|
|
|
|
|
|
result = usb_submit_urb( port->interrupt_in_urb, GFP_NOIO );
|
|
|
|
dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return count;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int kobil_write_room (struct usb_serial_port *port)
|
|
|
|
{
|
|
|
|
//dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
return 8;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int kobil_tiocmget(struct usb_serial_port *port, struct file *file)
|
|
|
|
{
|
|
|
|
struct kobil_private * priv;
|
|
|
|
int result;
|
|
|
|
unsigned char *transfer_buffer;
|
|
|
|
int transfer_buffer_length = 8;
|
|
|
|
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
|
|
|
|
// This device doesn't support ioctl calls
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
// allocate memory for transfer buffer
|
2006-02-27 13:29:43 -07:00
|
|
|
transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (!transfer_buffer) {
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_GetStatusLineState,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
|
|
|
|
0,
|
|
|
|
0,
|
|
|
|
transfer_buffer,
|
|
|
|
transfer_buffer_length,
|
|
|
|
KOBIL_TIMEOUT);
|
|
|
|
|
|
|
|
dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x",
|
|
|
|
__FUNCTION__, port->number, result, transfer_buffer[0]);
|
|
|
|
|
|
|
|
if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) {
|
|
|
|
priv->line_state |= TIOCM_DSR;
|
|
|
|
} else {
|
|
|
|
priv->line_state &= ~TIOCM_DSR;
|
|
|
|
}
|
|
|
|
|
|
|
|
kfree(transfer_buffer);
|
|
|
|
return priv->line_state;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kobil_tiocmset(struct usb_serial_port *port, struct file *file,
|
|
|
|
unsigned int set, unsigned int clear)
|
|
|
|
{
|
|
|
|
struct kobil_private * priv;
|
|
|
|
int result;
|
|
|
|
int dtr = 0;
|
|
|
|
int rts = 0;
|
|
|
|
unsigned char *transfer_buffer;
|
|
|
|
int transfer_buffer_length = 8;
|
|
|
|
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
|
|
|
|
// This device doesn't support ioctl calls
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
// allocate memory for transfer buffer
|
2006-02-27 13:29:43 -07:00
|
|
|
transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (! transfer_buffer) {
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (set & TIOCM_RTS)
|
|
|
|
rts = 1;
|
|
|
|
if (set & TIOCM_DTR)
|
|
|
|
dtr = 1;
|
|
|
|
if (clear & TIOCM_RTS)
|
|
|
|
rts = 0;
|
|
|
|
if (clear & TIOCM_DTR)
|
|
|
|
dtr = 0;
|
|
|
|
|
|
|
|
if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
|
|
|
|
if (dtr != 0)
|
|
|
|
dbg("%s - port %d Setting DTR", __FUNCTION__, port->number);
|
|
|
|
else
|
|
|
|
dbg("%s - port %d Clearing DTR", __FUNCTION__, port->number);
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_SetStatusLinesOrQueues,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
|
|
|
|
0,
|
|
|
|
transfer_buffer,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT);
|
|
|
|
} else {
|
|
|
|
if (rts != 0)
|
|
|
|
dbg("%s - port %d Setting RTS", __FUNCTION__, port->number);
|
|
|
|
else
|
|
|
|
dbg("%s - port %d Clearing RTS", __FUNCTION__, port->number);
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_SetStatusLinesOrQueues,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
|
|
|
|
0,
|
|
|
|
transfer_buffer,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT);
|
|
|
|
}
|
|
|
|
dbg("%s - port %d Send set_status_line URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
kfree(transfer_buffer);
|
|
|
|
return (result < 0) ? result : 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int kobil_ioctl(struct usb_serial_port *port, struct file *file,
|
|
|
|
unsigned int cmd, unsigned long arg)
|
|
|
|
{
|
|
|
|
struct kobil_private * priv;
|
|
|
|
int result;
|
|
|
|
unsigned short urb_val = 0;
|
|
|
|
unsigned char *transfer_buffer;
|
|
|
|
int transfer_buffer_length = 8;
|
|
|
|
char *settings;
|
|
|
|
void __user *user_arg = (void __user *)arg;
|
|
|
|
|
|
|
|
priv = usb_get_serial_port_data(port);
|
|
|
|
if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
|
|
|
|
// This device doesn't support ioctl calls
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case TCGETS: // 0x5401
|
2006-12-08 03:38:45 -07:00
|
|
|
if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct ktermios))) {
|
2005-04-16 15:20:36 -07:00
|
|
|
dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
2006-12-08 03:38:45 -07:00
|
|
|
if (kernel_termios_to_user_termios((struct ktermios __user *)arg,
|
2005-04-16 15:20:36 -07:00
|
|
|
&priv->internal_termios))
|
|
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case TCSETS: // 0x5402
|
|
|
|
if (!(port->tty->termios)) {
|
|
|
|
dbg("%s - port %d Error: port->tty->termios is NULL", __FUNCTION__, port->number);
|
|
|
|
return -ENOTTY;
|
|
|
|
}
|
2006-12-08 03:38:45 -07:00
|
|
|
if (!access_ok(VERIFY_READ, user_arg, sizeof(struct ktermios))) {
|
2005-04-16 15:20:36 -07:00
|
|
|
dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
|
|
|
|
return -EFAULT;
|
|
|
|
}
|
|
|
|
if (user_termios_to_kernel_termios(&priv->internal_termios,
|
2006-12-08 03:38:45 -07:00
|
|
|
(struct ktermios __user *)arg))
|
2005-04-16 15:20:36 -07:00
|
|
|
return -EFAULT;
|
|
|
|
|
2006-02-27 13:29:43 -07:00
|
|
|
settings = kzalloc(50, GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (! settings) {
|
|
|
|
return -ENOBUFS;
|
|
|
|
}
|
|
|
|
|
|
|
|
switch (priv->internal_termios.c_cflag & CBAUD) {
|
|
|
|
case B1200:
|
|
|
|
urb_val = SUSBCR_SBR_1200;
|
|
|
|
strcat(settings, "1200 ");
|
|
|
|
break;
|
|
|
|
case B9600:
|
|
|
|
default:
|
|
|
|
urb_val = SUSBCR_SBR_9600;
|
|
|
|
strcat(settings, "9600 ");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
urb_val |= (priv->internal_termios.c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : SUSBCR_SPASB_1StopBit;
|
|
|
|
strcat(settings, (priv->internal_termios.c_cflag & CSTOPB) ? "2 StopBits " : "1 StopBit ");
|
|
|
|
|
|
|
|
if (priv->internal_termios.c_cflag & PARENB) {
|
|
|
|
if (priv->internal_termios.c_cflag & PARODD) {
|
|
|
|
urb_val |= SUSBCR_SPASB_OddParity;
|
|
|
|
strcat(settings, "Odd Parity");
|
|
|
|
} else {
|
|
|
|
urb_val |= SUSBCR_SPASB_EvenParity;
|
|
|
|
strcat(settings, "Even Parity");
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
urb_val |= SUSBCR_SPASB_NoParity;
|
|
|
|
strcat(settings, "No Parity");
|
|
|
|
}
|
|
|
|
dbg("%s - port %d setting port to: %s", __FUNCTION__, port->number, settings );
|
|
|
|
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_SetBaudRateParityAndStopBits,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
urb_val,
|
|
|
|
0,
|
|
|
|
settings,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT
|
|
|
|
);
|
|
|
|
|
|
|
|
dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
kfree(settings);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
case TCFLSH: // 0x540B
|
2006-12-13 01:35:56 -07:00
|
|
|
transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
|
2005-04-16 15:20:36 -07:00
|
|
|
if (! transfer_buffer) {
|
|
|
|
return -ENOBUFS;
|
|
|
|
}
|
|
|
|
|
|
|
|
result = usb_control_msg( port->serial->dev,
|
|
|
|
usb_rcvctrlpipe(port->serial->dev, 0 ),
|
|
|
|
SUSBCRequest_Misc,
|
|
|
|
USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
|
|
|
|
SUSBCR_MSC_ResetAllQueues,
|
|
|
|
0,
|
|
|
|
NULL,//transfer_buffer,
|
|
|
|
0,
|
|
|
|
KOBIL_TIMEOUT
|
|
|
|
);
|
|
|
|
|
|
|
|
dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __FUNCTION__, port->number, result);
|
|
|
|
|
|
|
|
kfree(transfer_buffer);
|
|
|
|
return ((result < 0) ? -EFAULT : 0);
|
|
|
|
|
|
|
|
}
|
|
|
|
return -ENOIOCTLCMD;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static int __init kobil_init (void)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
retval = usb_serial_register(&kobil_device);
|
|
|
|
if (retval)
|
|
|
|
goto failed_usb_serial_register;
|
|
|
|
retval = usb_register(&kobil_driver);
|
|
|
|
if (retval)
|
|
|
|
goto failed_usb_register;
|
|
|
|
|
|
|
|
info(DRIVER_VERSION " " DRIVER_AUTHOR);
|
|
|
|
info(DRIVER_DESC);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
failed_usb_register:
|
|
|
|
usb_serial_deregister(&kobil_device);
|
|
|
|
failed_usb_serial_register:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void __exit kobil_exit (void)
|
|
|
|
{
|
|
|
|
usb_deregister (&kobil_driver);
|
|
|
|
usb_serial_deregister (&kobil_device);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(kobil_init);
|
|
|
|
module_exit(kobil_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
|
|
MODULE_LICENSE( "GPL" );
|
|
|
|
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
|
|
MODULE_PARM_DESC(debug, "Debug enabled or not");
|