![Alan Cox](/assets/img/avatar_default.png)
This is the grungy swap all the occurrences in the right places patch that goes with the updates. At this point we have the same functionality as before (except that sgttyb() returns speeds not zero) and are ready to begin turning new stuff on providing nobody reports lots of bugs If you are a tty driver author converting an out of tree driver the only impact should be termios->ktermios name changes for the speed/property setting functions from your upper layers. If you are implementing your own TCGETS function before then your driver was broken already and its about to get a whole lot more painful for you so please fix it 8) Also fill in c_ispeed/ospeed on init for most devices, although the current code will do this for you anyway but I'd like eventually to lose that extra paranoia [akpm@osdl.org: bluetooth fix] [mp3@de.ibm.com: sclp fix] [mp3@de.ibm.com: warning fix for tty3270] [hugh@veritas.com: fix tty_ioctl powerpc build] [jdike@addtoit.com: uml: fix ->set_termios declaration] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Martin Peschke <mp3@de.ibm.com> Acked-by: Peter Oberparleiter <oberpar@de.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
626 lines
16 KiB
C
626 lines
16 KiB
C
/*
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* USB IR Dongle driver
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*
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* Copyright (C) 2001-2002 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2002 Gary Brubaker (xavyer@ix.netcom.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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* This driver allows a USB IrDA device to be used as a "dumb" serial device.
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* This can be useful if you do not have access to a full IrDA stack on the
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* other side of the connection. If you do have an IrDA stack on both devices,
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* please use the usb-irda driver, as it contains the proper error checking and
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* other goodness of a full IrDA stack.
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*
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* Portions of this driver were taken from drivers/net/irda/irda-usb.c, which
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* was written by Roman Weissgaerber <weissg@vienna.at>, Dag Brattli
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* <dag@brattli.net>, and Jean Tourrilhes <jt@hpl.hp.com>
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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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* 2002_Mar_07 greg kh
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* moved some needed structures and #define values from the
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* net/irda/irda-usb.h file into our file, as we don't want to depend on
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* that codebase compiling correctly :)
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*
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* 2002_Jan_14 gb
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* Added module parameter to force specific number of XBOFs.
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* Added ir_xbof_change().
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* Reorganized read_bulk_callback error handling.
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* Switched from FILL_BULK_URB() to usb_fill_bulk_urb().
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*
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* 2001_Nov_08 greg kh
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* Changed the irda_usb_find_class_desc() function based on comments and
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* code from Martin Diehl.
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*
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* 2001_Nov_01 greg kh
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* Added support for more IrDA USB devices.
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* Added support for zero packet. Added buffer override paramater, so
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* users can transfer larger packets at once if they wish. Both patches
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* came from Dag Brattli <dag@obexcode.com>.
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*
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* 2001_Oct_07 greg kh
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* initial version released.
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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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#include <linux/usb/serial.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "v0.4"
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#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
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#define DRIVER_DESC "USB IR Dongle driver"
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/* USB IrDA class spec information */
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#define USB_CLASS_IRDA 0x02
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#define USB_DT_IRDA 0x21
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#define IU_REQ_GET_CLASS_DESC 0x06
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#define SPEED_2400 0x01
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#define SPEED_9600 0x02
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#define SPEED_19200 0x03
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#define SPEED_38400 0x04
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#define SPEED_57600 0x05
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#define SPEED_115200 0x06
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#define SPEED_576000 0x07
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#define SPEED_1152000 0x08
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#define SPEED_4000000 0x09
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struct irda_class_desc {
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u8 bLength;
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u8 bDescriptorType;
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u16 bcdSpecRevision;
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u8 bmDataSize;
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u8 bmWindowSize;
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u8 bmMinTurnaroundTime;
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u16 wBaudRate;
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u8 bmAdditionalBOFs;
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u8 bIrdaRateSniff;
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u8 bMaxUnicastList;
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} __attribute__ ((packed));
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static int debug;
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/* if overridden by the user, then use their value for the size of the read and
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* write urbs */
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static int buffer_size;
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/* if overridden by the user, then use the specified number of XBOFs */
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static int xbof = -1;
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static int ir_startup (struct usb_serial *serial);
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static int ir_open (struct usb_serial_port *port, struct file *filep);
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static void ir_close (struct usb_serial_port *port, struct file *filep);
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static int ir_write (struct usb_serial_port *port, const unsigned char *buf, int count);
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static void ir_write_bulk_callback (struct urb *urb);
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static void ir_read_bulk_callback (struct urb *urb);
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static void ir_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
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static u8 ir_baud = 0;
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static u8 ir_xbof = 0;
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static u8 ir_add_bof = 0;
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static struct usb_device_id id_table [] = {
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{ USB_DEVICE(0x050f, 0x0180) }, /* KC Technology, KC-180 */
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{ USB_DEVICE(0x08e9, 0x0100) }, /* XTNDAccess */
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{ USB_DEVICE(0x09c4, 0x0011) }, /* ACTiSys ACT-IR2000U */
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{ USB_INTERFACE_INFO (USB_CLASS_APP_SPEC, USB_CLASS_IRDA, 0) },
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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 ir_driver = {
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.name = "ir-usb",
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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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.no_dynamic_id = 1,
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};
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static struct usb_serial_driver ir_device = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "ir-usb",
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},
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.description = "IR Dongle",
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.id_table = id_table,
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.num_interrupt_in = 1,
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.num_bulk_in = 1,
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.num_bulk_out = 1,
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.num_ports = 1,
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.set_termios = ir_set_termios,
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.attach = ir_startup,
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.open = ir_open,
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.close = ir_close,
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.write = ir_write,
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.write_bulk_callback = ir_write_bulk_callback,
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.read_bulk_callback = ir_read_bulk_callback,
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};
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static inline void irda_usb_dump_class_desc(struct irda_class_desc *desc)
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{
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dbg("bLength=%x", desc->bLength);
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dbg("bDescriptorType=%x", desc->bDescriptorType);
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dbg("bcdSpecRevision=%x", desc->bcdSpecRevision);
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dbg("bmDataSize=%x", desc->bmDataSize);
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dbg("bmWindowSize=%x", desc->bmWindowSize);
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dbg("bmMinTurnaroundTime=%d", desc->bmMinTurnaroundTime);
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dbg("wBaudRate=%x", desc->wBaudRate);
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dbg("bmAdditionalBOFs=%x", desc->bmAdditionalBOFs);
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dbg("bIrdaRateSniff=%x", desc->bIrdaRateSniff);
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dbg("bMaxUnicastList=%x", desc->bMaxUnicastList);
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}
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/*------------------------------------------------------------------*/
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/*
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* Function irda_usb_find_class_desc(dev, ifnum)
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*
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* Returns instance of IrDA class descriptor, or NULL if not found
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*
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* The class descriptor is some extra info that IrDA USB devices will
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* offer to us, describing their IrDA characteristics. We will use that in
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* irda_usb_init_qos()
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*
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* Based on the same function in drivers/net/irda/irda-usb.c
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*/
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static struct irda_class_desc *irda_usb_find_class_desc(struct usb_device *dev, unsigned int ifnum)
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{
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struct irda_class_desc *desc;
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int ret;
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desc = kzalloc(sizeof (struct irda_class_desc), GFP_KERNEL);
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if (desc == NULL)
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return NULL;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
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IU_REQ_GET_CLASS_DESC,
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USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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0, ifnum, desc, sizeof(*desc), 1000);
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dbg("%s - ret=%d", __FUNCTION__, ret);
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if (ret < sizeof(*desc)) {
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dbg("%s - class descriptor read %s (%d)",
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__FUNCTION__,
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(ret<0) ? "failed" : "too short",
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ret);
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goto error;
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}
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if (desc->bDescriptorType != USB_DT_IRDA) {
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dbg("%s - bad class descriptor type", __FUNCTION__);
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goto error;
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}
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irda_usb_dump_class_desc(desc);
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return desc;
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error:
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kfree(desc);
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return NULL;
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}
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static u8 ir_xbof_change(u8 xbof)
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{
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u8 result;
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/* reference irda-usb.c */
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switch(xbof) {
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case 48: result = 0x10; break;
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case 28:
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case 24: result = 0x20; break;
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default:
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case 12: result = 0x30; break;
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case 5:
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case 6: result = 0x40; break;
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case 3: result = 0x50; break;
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case 2: result = 0x60; break;
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case 1: result = 0x70; break;
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case 0: result = 0x80; break;
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}
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return(result);
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}
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static int ir_startup (struct usb_serial *serial)
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{
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struct irda_class_desc *irda_desc;
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irda_desc = irda_usb_find_class_desc (serial->dev, 0);
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if (irda_desc == NULL) {
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dev_err (&serial->dev->dev, "IRDA class descriptor not found, device not bound\n");
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return -ENODEV;
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}
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dbg ("%s - Baud rates supported:%s%s%s%s%s%s%s%s%s",
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__FUNCTION__,
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(irda_desc->wBaudRate & 0x0001) ? " 2400" : "",
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(irda_desc->wBaudRate & 0x0002) ? " 9600" : "",
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(irda_desc->wBaudRate & 0x0004) ? " 19200" : "",
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(irda_desc->wBaudRate & 0x0008) ? " 38400" : "",
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(irda_desc->wBaudRate & 0x0010) ? " 57600" : "",
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(irda_desc->wBaudRate & 0x0020) ? " 115200" : "",
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(irda_desc->wBaudRate & 0x0040) ? " 576000" : "",
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(irda_desc->wBaudRate & 0x0080) ? " 1152000" : "",
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(irda_desc->wBaudRate & 0x0100) ? " 4000000" : "");
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switch( irda_desc->bmAdditionalBOFs ) {
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case 0x01: ir_add_bof = 48; break;
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case 0x02: ir_add_bof = 24; break;
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case 0x04: ir_add_bof = 12; break;
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case 0x08: ir_add_bof = 6; break;
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case 0x10: ir_add_bof = 3; break;
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case 0x20: ir_add_bof = 2; break;
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case 0x40: ir_add_bof = 1; break;
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case 0x80: ir_add_bof = 0; break;
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default:;
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}
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kfree (irda_desc);
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return 0;
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}
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static int ir_open (struct usb_serial_port *port, struct file *filp)
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{
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char *buffer;
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int result = 0;
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dbg("%s - port %d", __FUNCTION__, port->number);
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if (buffer_size) {
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/* override the default buffer sizes */
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buffer = kmalloc (buffer_size, GFP_KERNEL);
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if (!buffer) {
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dev_err (&port->dev, "%s - out of memory.\n", __FUNCTION__);
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return -ENOMEM;
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}
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kfree (port->read_urb->transfer_buffer);
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port->read_urb->transfer_buffer = buffer;
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port->read_urb->transfer_buffer_length = buffer_size;
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buffer = kmalloc (buffer_size, GFP_KERNEL);
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if (!buffer) {
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dev_err (&port->dev, "%s - out of memory.\n", __FUNCTION__);
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return -ENOMEM;
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}
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kfree (port->write_urb->transfer_buffer);
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port->write_urb->transfer_buffer = buffer;
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port->write_urb->transfer_buffer_length = buffer_size;
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port->bulk_out_size = buffer_size;
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}
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/* Start reading from the device */
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usb_fill_bulk_urb (
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port->read_urb,
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port->serial->dev,
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usb_rcvbulkpipe(port->serial->dev, port->bulk_in_endpointAddress),
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port->read_urb->transfer_buffer,
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port->read_urb->transfer_buffer_length,
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ir_read_bulk_callback,
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port);
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result = usb_submit_urb(port->read_urb, GFP_KERNEL);
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if (result)
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dev_err(&port->dev, "%s - failed submitting read urb, error %d\n", __FUNCTION__, result);
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return result;
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}
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static void ir_close (struct usb_serial_port *port, struct file * filp)
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{
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dbg("%s - port %d", __FUNCTION__, port->number);
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/* shutdown our bulk read */
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usb_kill_urb(port->read_urb);
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}
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static int ir_write (struct usb_serial_port *port, const unsigned char *buf, int count)
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{
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unsigned char *transfer_buffer;
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int result;
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int transfer_size;
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dbg("%s - port = %d, count = %d", __FUNCTION__, port->number, count);
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if (!port->tty) {
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dev_err (&port->dev, "%s - no tty???\n", __FUNCTION__);
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return 0;
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}
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if (count == 0)
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return 0;
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spin_lock_bh(&port->lock);
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if (port->write_urb_busy) {
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spin_unlock_bh(&port->lock);
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dbg("%s - already writing", __FUNCTION__);
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return 0;
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}
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port->write_urb_busy = 1;
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spin_unlock_bh(&port->lock);
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transfer_buffer = port->write_urb->transfer_buffer;
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transfer_size = min(count, port->bulk_out_size - 1);
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/*
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* The first byte of the packet we send to the device contains an
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* inband header which indicates an additional number of BOFs and
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* a baud rate change.
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*
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* See section 5.4.2.2 of the USB IrDA spec.
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*/
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*transfer_buffer = ir_xbof | ir_baud;
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++transfer_buffer;
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memcpy (transfer_buffer, buf, transfer_size);
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usb_fill_bulk_urb (
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port->write_urb,
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port->serial->dev,
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usb_sndbulkpipe(port->serial->dev,
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port->bulk_out_endpointAddress),
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port->write_urb->transfer_buffer,
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transfer_size + 1,
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ir_write_bulk_callback,
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port);
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port->write_urb->transfer_flags = URB_ZERO_PACKET;
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result = usb_submit_urb (port->write_urb, GFP_ATOMIC);
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if (result) {
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port->write_urb_busy = 0;
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dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
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} else
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result = transfer_size;
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return result;
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}
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static void ir_write_bulk_callback (struct urb *urb)
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{
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struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
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dbg("%s - port %d", __FUNCTION__, port->number);
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port->write_urb_busy = 0;
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if (urb->status) {
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dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
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return;
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}
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usb_serial_debug_data (
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debug,
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&port->dev,
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__FUNCTION__,
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urb->actual_length,
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urb->transfer_buffer);
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usb_serial_port_softint(port);
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}
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static void ir_read_bulk_callback (struct urb *urb)
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{
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struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
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struct tty_struct *tty;
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unsigned char *data = urb->transfer_buffer;
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int result;
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dbg("%s - port %d", __FUNCTION__, port->number);
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if (!port->open_count) {
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dbg("%s - port closed.", __FUNCTION__);
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return;
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}
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switch (urb->status) {
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case 0: /* Successful */
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/*
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* The first byte of the packet we get from the device
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* contains a busy indicator and baud rate change.
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* See section 5.4.1.2 of the USB IrDA spec.
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*/
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if ((*data & 0x0f) > 0)
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ir_baud = *data & 0x0f;
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usb_serial_debug_data (
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debug,
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&port->dev,
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__FUNCTION__,
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urb->actual_length,
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data);
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/*
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* Bypass flip-buffers, and feed the ldisc directly
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* due to our potentially large buffer size. Since we
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* used to set low_latency, this is exactly what the
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* tty layer did anyway :)
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*/
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tty = port->tty;
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/*
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* FIXME: must not do this in IRQ context
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*/
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tty->ldisc.receive_buf(
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tty,
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data+1,
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NULL,
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urb->actual_length-1);
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/*
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* No break here.
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* We want to resubmit the urb so we can read
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* again.
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*/
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case -EPROTO: /* taking inspiration from pl2303.c */
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/* Continue trying to always read */
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|
usb_fill_bulk_urb (
|
|
port->read_urb,
|
|
port->serial->dev,
|
|
usb_rcvbulkpipe(port->serial->dev,
|
|
port->bulk_in_endpointAddress),
|
|
port->read_urb->transfer_buffer,
|
|
port->read_urb->transfer_buffer_length,
|
|
ir_read_bulk_callback,
|
|
port);
|
|
|
|
result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
|
|
if (result)
|
|
dev_err(&port->dev, "%s - failed resubmitting read urb, error %d\n",
|
|
__FUNCTION__, result);
|
|
|
|
break ;
|
|
|
|
default:
|
|
dbg("%s - nonzero read bulk status received: %d",
|
|
__FUNCTION__,
|
|
urb->status);
|
|
break ;
|
|
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
static void ir_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
|
|
{
|
|
unsigned char *transfer_buffer;
|
|
unsigned int cflag;
|
|
int result;
|
|
|
|
dbg("%s - port %d", __FUNCTION__, port->number);
|
|
|
|
if ((!port->tty) || (!port->tty->termios)) {
|
|
dbg("%s - no tty structures", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
cflag = port->tty->termios->c_cflag;
|
|
/* check that they really want us to change something */
|
|
if (old_termios) {
|
|
if ((cflag == old_termios->c_cflag) &&
|
|
(RELEVANT_IFLAG(port->tty->termios->c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) {
|
|
dbg("%s - nothing to change...", __FUNCTION__);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* All we can change is the baud rate */
|
|
if (cflag & CBAUD) {
|
|
|
|
dbg ("%s - asking for baud %d",
|
|
__FUNCTION__,
|
|
tty_get_baud_rate(port->tty));
|
|
|
|
/*
|
|
* FIXME, we should compare the baud request against the
|
|
* capability stated in the IR header that we got in the
|
|
* startup function.
|
|
*/
|
|
switch (cflag & CBAUD) {
|
|
case B2400: ir_baud = SPEED_2400; break;
|
|
default:
|
|
case B9600: ir_baud = SPEED_9600; break;
|
|
case B19200: ir_baud = SPEED_19200; break;
|
|
case B38400: ir_baud = SPEED_38400; break;
|
|
case B57600: ir_baud = SPEED_57600; break;
|
|
case B115200: ir_baud = SPEED_115200; break;
|
|
case B576000: ir_baud = SPEED_576000; break;
|
|
case B1152000: ir_baud = SPEED_1152000; break;
|
|
#ifdef B4000000
|
|
case B4000000: ir_baud = SPEED_4000000; break;
|
|
#endif
|
|
}
|
|
|
|
if (xbof == -1) {
|
|
ir_xbof = ir_xbof_change(ir_add_bof);
|
|
} else {
|
|
ir_xbof = ir_xbof_change(xbof) ;
|
|
}
|
|
|
|
/* Notify the tty driver that the termios have changed. */
|
|
port->tty->ldisc.set_termios(port->tty, NULL);
|
|
|
|
/* FIXME need to check to see if our write urb is busy right
|
|
* now, or use a urb pool.
|
|
*
|
|
* send the baud change out on an "empty" data packet
|
|
*/
|
|
transfer_buffer = port->write_urb->transfer_buffer;
|
|
*transfer_buffer = ir_xbof | ir_baud;
|
|
|
|
usb_fill_bulk_urb (
|
|
port->write_urb,
|
|
port->serial->dev,
|
|
usb_sndbulkpipe(port->serial->dev,
|
|
port->bulk_out_endpointAddress),
|
|
port->write_urb->transfer_buffer,
|
|
1,
|
|
ir_write_bulk_callback,
|
|
port);
|
|
|
|
port->write_urb->transfer_flags = URB_ZERO_PACKET;
|
|
|
|
result = usb_submit_urb (port->write_urb, GFP_KERNEL);
|
|
if (result)
|
|
dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
static int __init ir_init (void)
|
|
{
|
|
int retval;
|
|
retval = usb_serial_register(&ir_device);
|
|
if (retval)
|
|
goto failed_usb_serial_register;
|
|
retval = usb_register(&ir_driver);
|
|
if (retval)
|
|
goto failed_usb_register;
|
|
info(DRIVER_DESC " " DRIVER_VERSION);
|
|
return 0;
|
|
failed_usb_register:
|
|
usb_serial_deregister(&ir_device);
|
|
failed_usb_serial_register:
|
|
return retval;
|
|
}
|
|
|
|
|
|
static void __exit ir_exit (void)
|
|
{
|
|
usb_deregister (&ir_driver);
|
|
usb_serial_deregister (&ir_device);
|
|
}
|
|
|
|
|
|
module_init(ir_init);
|
|
module_exit(ir_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");
|
|
module_param(xbof, int, 0);
|
|
MODULE_PARM_DESC(xbof, "Force specific number of XBOFs");
|
|
module_param(buffer_size, int, 0);
|
|
MODULE_PARM_DESC(buffer_size, "Size of the transfer buffers");
|
|
|