mirror of https://gitee.com/openkylin/linux.git
V4L/DVB: staging/lirc: add lirc_sasem driver
Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jarod Wilson
Mauro Carvalho Chehab
parent
805a896665
commit
c5ac457117
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@ -0,0 +1,933 @@
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/*
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* lirc_sasem.c - USB remote support for LIRC
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* Version 0.5
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*
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* Copyright (C) 2004-2005 Oliver Stabel <oliver.stabel@gmx.de>
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* Tim Davies <tim@opensystems.net.au>
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*
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* This driver was derived from:
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* Venky Raju <dev@venky.ws>
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* "lirc_imon - "LIRC/VFD driver for Ahanix/Soundgraph IMON IR/VFD"
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* Paul Miller <pmiller9@users.sourceforge.net>'s 2003-2004
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* "lirc_atiusb - USB remote support for LIRC"
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* Culver Consulting Services <henry@culcon.com>'s 2003
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* "Sasem OnAir VFD/IR USB driver"
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*
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*
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* NOTE - The LCDproc iMon driver should work with this module. More info at
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* http://www.frogstorm.info/sasem
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*/
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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 program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/usb.h>
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#include <media/lirc.h>
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#include <media/lirc_dev.h>
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#define MOD_AUTHOR "Oliver Stabel <oliver.stabel@gmx.de>, " \
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"Tim Davies <tim@opensystems.net.au>"
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#define MOD_DESC "USB Driver for Sasem Remote Controller V1.1"
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#define MOD_NAME "lirc_sasem"
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#define MOD_VERSION "0.5"
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#define VFD_MINOR_BASE 144 /* Same as LCD */
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#define DEVICE_NAME "lcd%d"
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#define BUF_CHUNK_SIZE 8
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#define BUF_SIZE 128
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#define IOCTL_LCD_CONTRAST 1
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/*** P R O T O T Y P E S ***/
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/* USB Callback prototypes */
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static int sasem_probe(struct usb_interface *interface,
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const struct usb_device_id *id);
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static void sasem_disconnect(struct usb_interface *interface);
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static void usb_rx_callback(struct urb *urb);
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static void usb_tx_callback(struct urb *urb);
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/* VFD file_operations function prototypes */
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static int vfd_open(struct inode *inode, struct file *file);
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static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg);
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static int vfd_close(struct inode *inode, struct file *file);
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static ssize_t vfd_write(struct file *file, const char *buf,
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size_t n_bytes, loff_t *pos);
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/* LIRC driver function prototypes */
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static int ir_open(void *data);
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static void ir_close(void *data);
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/* Driver init/exit prototypes */
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static int __init sasem_init(void);
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static void __exit sasem_exit(void);
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/*** G L O B A L S ***/
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#define SASEM_DATA_BUF_SZ 32
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struct sasem_context {
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struct usb_device *dev;
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int vfd_isopen; /* VFD port has been opened */
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unsigned int vfd_contrast; /* VFD contrast */
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int ir_isopen; /* IR port has been opened */
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int dev_present; /* USB device presence */
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struct mutex ctx_lock; /* to lock this object */
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wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
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struct lirc_driver *driver;
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struct usb_endpoint_descriptor *rx_endpoint;
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struct usb_endpoint_descriptor *tx_endpoint;
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struct urb *rx_urb;
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struct urb *tx_urb;
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unsigned char usb_rx_buf[8];
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unsigned char usb_tx_buf[8];
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struct tx_t {
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unsigned char data_buf[SASEM_DATA_BUF_SZ]; /* user data buffer */
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struct completion finished; /* wait for write to finish */
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atomic_t busy; /* write in progress */
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int status; /* status of tx completion */
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} tx;
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/* for dealing with repeat codes (wish there was a toggle bit!) */
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struct timeval presstime;
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char lastcode[8];
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int codesaved;
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};
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/* VFD file operations */
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static struct file_operations vfd_fops = {
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.owner = THIS_MODULE,
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.open = &vfd_open,
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.write = &vfd_write,
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.unlocked_ioctl = &vfd_ioctl,
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.release = &vfd_close,
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};
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/* USB Device ID for Sasem USB Control Board */
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static struct usb_device_id sasem_usb_id_table[] = {
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/* Sasem USB Control Board */
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{ USB_DEVICE(0x11ba, 0x0101) },
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/* Terminating entry */
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{}
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};
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/* USB Device data */
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static struct usb_driver sasem_driver = {
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.name = MOD_NAME,
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.probe = sasem_probe,
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.disconnect = sasem_disconnect,
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.id_table = sasem_usb_id_table,
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};
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static struct usb_class_driver sasem_class = {
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.name = DEVICE_NAME,
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.fops = &vfd_fops,
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.minor_base = VFD_MINOR_BASE,
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};
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/* to prevent races between open() and disconnect() */
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static DEFINE_MUTEX(disconnect_lock);
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static int debug;
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/*** M O D U L E C O D E ***/
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MODULE_AUTHOR(MOD_AUTHOR);
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MODULE_DESCRIPTION(MOD_DESC);
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MODULE_LICENSE("GPL");
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module_param(debug, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes (default: no)");
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static void delete_context(struct sasem_context *context)
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{
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usb_free_urb(context->tx_urb); /* VFD */
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usb_free_urb(context->rx_urb); /* IR */
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lirc_buffer_free(context->driver->rbuf);
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kfree(context->driver->rbuf);
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kfree(context->driver);
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kfree(context);
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if (debug)
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printk(KERN_INFO "%s: context deleted\n", __func__);
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}
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static void deregister_from_lirc(struct sasem_context *context)
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{
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int retval;
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int minor = context->driver->minor;
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retval = lirc_unregister_driver(minor);
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if (retval)
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err("%s: unable to deregister from lirc (%d)",
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__func__, retval);
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else
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printk(KERN_INFO "Deregistered Sasem driver (minor:%d)\n",
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minor);
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}
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/**
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* Called when the VFD device (e.g. /dev/usb/lcd)
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* is opened by the application.
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*/
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static int vfd_open(struct inode *inode, struct file *file)
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{
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struct usb_interface *interface;
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struct sasem_context *context = NULL;
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int subminor;
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int retval = 0;
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/* prevent races with disconnect */
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mutex_lock(&disconnect_lock);
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subminor = iminor(inode);
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interface = usb_find_interface(&sasem_driver, subminor);
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if (!interface) {
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err("%s: could not find interface for minor %d",
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__func__, subminor);
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retval = -ENODEV;
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goto exit;
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}
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context = usb_get_intfdata(interface);
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if (!context) {
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err("%s: no context found for minor %d",
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__func__, subminor);
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retval = -ENODEV;
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goto exit;
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}
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mutex_lock(&context->ctx_lock);
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if (context->vfd_isopen) {
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err("%s: VFD port is already open", __func__);
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retval = -EBUSY;
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} else {
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context->vfd_isopen = 1;
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file->private_data = context;
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printk(KERN_INFO "VFD port opened\n");
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}
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mutex_unlock(&context->ctx_lock);
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exit:
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mutex_unlock(&disconnect_lock);
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return retval;
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}
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/**
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* Called when the VFD device (e.g. /dev/usb/lcd)
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* is closed by the application.
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*/
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static long vfd_ioctl(struct file *file, unsigned cmd, unsigned long arg)
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{
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struct sasem_context *context = NULL;
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context = (struct sasem_context *) file->private_data;
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if (!context) {
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err("%s: no context for device", __func__);
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return -ENODEV;
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}
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mutex_lock(&context->ctx_lock);
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switch (cmd) {
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case IOCTL_LCD_CONTRAST:
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if (arg > 1000)
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arg = 1000;
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context->vfd_contrast = (unsigned int)arg;
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break;
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default:
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printk(KERN_INFO "Unknown IOCTL command\n");
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mutex_unlock(&context->ctx_lock);
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return -ENOIOCTLCMD; /* not supported */
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}
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mutex_unlock(&context->ctx_lock);
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return 0;
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}
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/**
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* Called when the VFD device (e.g. /dev/usb/lcd)
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* is closed by the application.
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*/
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static int vfd_close(struct inode *inode, struct file *file)
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{
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struct sasem_context *context = NULL;
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int retval = 0;
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context = (struct sasem_context *) file->private_data;
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if (!context) {
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err("%s: no context for device", __func__);
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return -ENODEV;
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}
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mutex_lock(&context->ctx_lock);
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if (!context->vfd_isopen) {
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err("%s: VFD is not open", __func__);
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retval = -EIO;
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} else {
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context->vfd_isopen = 0;
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printk(KERN_INFO "VFD port closed\n");
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if (!context->dev_present && !context->ir_isopen) {
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/* Device disconnected before close and IR port is
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* not open. If IR port is open, context will be
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* deleted by ir_close. */
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mutex_unlock(&context->ctx_lock);
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delete_context(context);
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return retval;
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}
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}
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mutex_unlock(&context->ctx_lock);
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return retval;
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}
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/**
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* Sends a packet to the VFD.
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*/
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static int send_packet(struct sasem_context *context)
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{
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unsigned int pipe;
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int interval = 0;
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int retval = 0;
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pipe = usb_sndintpipe(context->dev,
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context->tx_endpoint->bEndpointAddress);
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interval = context->tx_endpoint->bInterval;
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usb_fill_int_urb(context->tx_urb, context->dev, pipe,
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context->usb_tx_buf, sizeof(context->usb_tx_buf),
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usb_tx_callback, context, interval);
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context->tx_urb->actual_length = 0;
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init_completion(&context->tx.finished);
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atomic_set(&(context->tx.busy), 1);
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retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
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if (retval) {
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atomic_set(&(context->tx.busy), 0);
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err("%s: error submitting urb (%d)", __func__, retval);
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} else {
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/* Wait for transmission to complete (or abort) */
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mutex_unlock(&context->ctx_lock);
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wait_for_completion(&context->tx.finished);
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mutex_lock(&context->ctx_lock);
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retval = context->tx.status;
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if (retval)
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err("%s: packet tx failed (%d)", __func__, retval);
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}
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return retval;
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}
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/**
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* Writes data to the VFD. The Sasem VFD is 2x16 characters
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* and requires data in 9 consecutive USB interrupt packets,
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* each packet carrying 8 bytes.
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*/
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static ssize_t vfd_write(struct file *file, const char *buf,
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size_t n_bytes, loff_t *pos)
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{
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int i;
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int retval = 0;
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struct sasem_context *context;
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int *data_buf;
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context = (struct sasem_context *) file->private_data;
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if (!context) {
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err("%s: no context for device", __func__);
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return -ENODEV;
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}
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mutex_lock(&context->ctx_lock);
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if (!context->dev_present) {
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err("%s: no Sasem device present", __func__);
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retval = -ENODEV;
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goto exit;
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}
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if (n_bytes <= 0 || n_bytes > SASEM_DATA_BUF_SZ) {
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err("%s: invalid payload size", __func__);
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retval = -EINVAL;
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goto exit;
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}
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|
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data_buf = memdup_user(buf, n_bytes);
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if (PTR_ERR(data_buf))
|
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return PTR_ERR(data_buf);
|
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memcpy(context->tx.data_buf, data_buf, n_bytes);
|
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|
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/* Pad with spaces */
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for (i = n_bytes; i < SASEM_DATA_BUF_SZ; ++i)
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context->tx.data_buf[i] = ' ';
|
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|
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/* Nine 8 byte packets to be sent */
|
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/* NOTE: "\x07\x01\0\0\0\0\0\0" or "\x0c\0\0\0\0\0\0\0"
|
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* will clear the VFD */
|
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for (i = 0; i < 9; i++) {
|
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switch (i) {
|
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case 0:
|
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memcpy(context->usb_tx_buf, "\x07\0\0\0\0\0\0\0", 8);
|
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context->usb_tx_buf[1] = (context->vfd_contrast) ?
|
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(0x2B - (context->vfd_contrast - 1) / 250)
|
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: 0x2B;
|
||||
break;
|
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case 1:
|
||||
memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8);
|
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break;
|
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case 2:
|
||||
memcpy(context->usb_tx_buf, "\x0b\x01\0\0\0\0\0\0", 8);
|
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break;
|
||||
case 3:
|
||||
memcpy(context->usb_tx_buf, context->tx.data_buf, 8);
|
||||
break;
|
||||
case 4:
|
||||
memcpy(context->usb_tx_buf,
|
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context->tx.data_buf + 8, 8);
|
||||
break;
|
||||
case 5:
|
||||
memcpy(context->usb_tx_buf, "\x09\x01\0\0\0\0\0\0", 8);
|
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break;
|
||||
case 6:
|
||||
memcpy(context->usb_tx_buf, "\x0b\x02\0\0\0\0\0\0", 8);
|
||||
break;
|
||||
case 7:
|
||||
memcpy(context->usb_tx_buf,
|
||||
context->tx.data_buf + 16, 8);
|
||||
break;
|
||||
case 8:
|
||||
memcpy(context->usb_tx_buf,
|
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context->tx.data_buf + 24, 8);
|
||||
break;
|
||||
}
|
||||
retval = send_packet(context);
|
||||
if (retval) {
|
||||
|
||||
err("%s: send packet failed for packet #%d",
|
||||
__func__, i);
|
||||
goto exit;
|
||||
}
|
||||
}
|
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exit:
|
||||
|
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mutex_unlock(&context->ctx_lock);
|
||||
|
||||
return (!retval) ? n_bytes : retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* Callback function for USB core API: transmit data
|
||||
*/
|
||||
static void usb_tx_callback(struct urb *urb)
|
||||
{
|
||||
struct sasem_context *context;
|
||||
|
||||
if (!urb)
|
||||
return;
|
||||
context = (struct sasem_context *) urb->context;
|
||||
if (!context)
|
||||
return;
|
||||
|
||||
context->tx.status = urb->status;
|
||||
|
||||
/* notify waiters that write has finished */
|
||||
atomic_set(&context->tx.busy, 0);
|
||||
complete(&context->tx.finished);
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* Called by lirc_dev when the application opens /dev/lirc
|
||||
*/
|
||||
static int ir_open(void *data)
|
||||
{
|
||||
int retval = 0;
|
||||
struct sasem_context *context;
|
||||
|
||||
/* prevent races with disconnect */
|
||||
mutex_lock(&disconnect_lock);
|
||||
|
||||
context = (struct sasem_context *) data;
|
||||
|
||||
mutex_lock(&context->ctx_lock);
|
||||
|
||||
if (context->ir_isopen) {
|
||||
err("%s: IR port is already open", __func__);
|
||||
retval = -EBUSY;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
usb_fill_int_urb(context->rx_urb, context->dev,
|
||||
usb_rcvintpipe(context->dev,
|
||||
context->rx_endpoint->bEndpointAddress),
|
||||
context->usb_rx_buf, sizeof(context->usb_rx_buf),
|
||||
usb_rx_callback, context, context->rx_endpoint->bInterval);
|
||||
|
||||
retval = usb_submit_urb(context->rx_urb, GFP_KERNEL);
|
||||
|
||||
if (retval)
|
||||
err("%s: usb_submit_urb failed for ir_open (%d)",
|
||||
__func__, retval);
|
||||
else {
|
||||
context->ir_isopen = 1;
|
||||
printk(KERN_INFO "IR port opened\n");
|
||||
}
|
||||
|
||||
exit:
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
|
||||
mutex_unlock(&disconnect_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Called by lirc_dev when the application closes /dev/lirc
|
||||
*/
|
||||
static void ir_close(void *data)
|
||||
{
|
||||
struct sasem_context *context;
|
||||
|
||||
context = (struct sasem_context *)data;
|
||||
if (!context) {
|
||||
err("%s: no context for device", __func__);
|
||||
return;
|
||||
}
|
||||
|
||||
mutex_lock(&context->ctx_lock);
|
||||
|
||||
usb_kill_urb(context->rx_urb);
|
||||
context->ir_isopen = 0;
|
||||
printk(KERN_INFO "IR port closed\n");
|
||||
|
||||
if (!context->dev_present) {
|
||||
|
||||
/*
|
||||
* Device disconnected while IR port was
|
||||
* still open. Driver was not deregistered
|
||||
* at disconnect time, so do it now.
|
||||
*/
|
||||
deregister_from_lirc(context);
|
||||
|
||||
if (!context->vfd_isopen) {
|
||||
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
delete_context(context);
|
||||
return;
|
||||
}
|
||||
/* If VFD port is open, context will be deleted by vfd_close */
|
||||
}
|
||||
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
return;
|
||||
}
|
||||
|
||||
/**
|
||||
* Process the incoming packet
|
||||
*/
|
||||
static void incoming_packet(struct sasem_context *context,
|
||||
struct urb *urb)
|
||||
{
|
||||
int len = urb->actual_length;
|
||||
unsigned char *buf = urb->transfer_buffer;
|
||||
long ms;
|
||||
struct timeval tv;
|
||||
|
||||
if (len != 8) {
|
||||
printk(KERN_WARNING "%s: invalid incoming packet size (%d)\n",
|
||||
__func__, len);
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
int i;
|
||||
for (i = 0; i < 8; ++i)
|
||||
printk(KERN_INFO "%02x ", buf[i]);
|
||||
printk(KERN_INFO "\n");
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Lirc could deal with the repeat code, but we really need to block it
|
||||
* if it arrives too late. Otherwise we could repeat the wrong code.
|
||||
*/
|
||||
|
||||
/* get the time since the last button press */
|
||||
do_gettimeofday(&tv);
|
||||
ms = (tv.tv_sec - context->presstime.tv_sec) * 1000 +
|
||||
(tv.tv_usec - context->presstime.tv_usec) / 1000;
|
||||
|
||||
if (memcmp(buf, "\x08\0\0\0\0\0\0\0", 8) == 0) {
|
||||
/*
|
||||
* the repeat code is being sent, so we copy
|
||||
* the old code to LIRC
|
||||
*/
|
||||
|
||||
/*
|
||||
* NOTE: Only if the last code was less than 250ms ago
|
||||
* - no one should be able to push another (undetected) button
|
||||
* in that time and then get a false repeat of the previous
|
||||
* press but it is long enough for a genuine repeat
|
||||
*/
|
||||
if ((ms < 250) && (context->codesaved != 0)) {
|
||||
memcpy(buf, &context->lastcode, 8);
|
||||
context->presstime.tv_sec = tv.tv_sec;
|
||||
context->presstime.tv_usec = tv.tv_usec;
|
||||
}
|
||||
} else {
|
||||
/* save the current valid code for repeats */
|
||||
memcpy(&context->lastcode, buf, 8);
|
||||
/*
|
||||
* set flag to signal a valid code was save;
|
||||
* just for safety reasons
|
||||
*/
|
||||
context->codesaved = 1;
|
||||
context->presstime.tv_sec = tv.tv_sec;
|
||||
context->presstime.tv_usec = tv.tv_usec;
|
||||
}
|
||||
|
||||
lirc_buffer_write(context->driver->rbuf, buf);
|
||||
wake_up(&context->driver->rbuf->wait_poll);
|
||||
}
|
||||
|
||||
/**
|
||||
* Callback function for USB core API: receive data
|
||||
*/
|
||||
static void usb_rx_callback(struct urb *urb)
|
||||
{
|
||||
struct sasem_context *context;
|
||||
|
||||
if (!urb)
|
||||
return;
|
||||
context = (struct sasem_context *) urb->context;
|
||||
if (!context)
|
||||
return;
|
||||
|
||||
switch (urb->status) {
|
||||
|
||||
case -ENOENT: /* usbcore unlink successful! */
|
||||
return;
|
||||
|
||||
case 0:
|
||||
if (context->ir_isopen)
|
||||
incoming_packet(context, urb);
|
||||
break;
|
||||
|
||||
default:
|
||||
printk(KERN_WARNING "%s: status (%d): ignored",
|
||||
__func__, urb->status);
|
||||
break;
|
||||
}
|
||||
|
||||
usb_submit_urb(context->rx_urb, GFP_ATOMIC);
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Callback function for USB core API: Probe
|
||||
*/
|
||||
static int sasem_probe(struct usb_interface *interface,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct usb_device *dev = NULL;
|
||||
struct usb_host_interface *iface_desc = NULL;
|
||||
struct usb_endpoint_descriptor *rx_endpoint = NULL;
|
||||
struct usb_endpoint_descriptor *tx_endpoint = NULL;
|
||||
struct urb *rx_urb = NULL;
|
||||
struct urb *tx_urb = NULL;
|
||||
struct lirc_driver *driver = NULL;
|
||||
struct lirc_buffer *rbuf = NULL;
|
||||
int lirc_minor = 0;
|
||||
int num_endpoints;
|
||||
int retval = 0;
|
||||
int vfd_ep_found;
|
||||
int ir_ep_found;
|
||||
int alloc_status;
|
||||
struct sasem_context *context = NULL;
|
||||
int i;
|
||||
|
||||
printk(KERN_INFO "%s: found Sasem device\n", __func__);
|
||||
|
||||
|
||||
dev = usb_get_dev(interface_to_usbdev(interface));
|
||||
iface_desc = interface->cur_altsetting;
|
||||
num_endpoints = iface_desc->desc.bNumEndpoints;
|
||||
|
||||
/*
|
||||
* Scan the endpoint list and set:
|
||||
* first input endpoint = IR endpoint
|
||||
* first output endpoint = VFD endpoint
|
||||
*/
|
||||
|
||||
ir_ep_found = 0;
|
||||
vfd_ep_found = 0;
|
||||
|
||||
for (i = 0; i < num_endpoints && !(ir_ep_found && vfd_ep_found); ++i) {
|
||||
|
||||
struct usb_endpoint_descriptor *ep;
|
||||
int ep_dir;
|
||||
int ep_type;
|
||||
ep = &iface_desc->endpoint [i].desc;
|
||||
ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
|
||||
ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
|
||||
|
||||
if (!ir_ep_found &&
|
||||
ep_dir == USB_DIR_IN &&
|
||||
ep_type == USB_ENDPOINT_XFER_INT) {
|
||||
|
||||
rx_endpoint = ep;
|
||||
ir_ep_found = 1;
|
||||
if (debug)
|
||||
printk(KERN_INFO "%s: found IR endpoint\n",
|
||||
__func__);
|
||||
|
||||
} else if (!vfd_ep_found &&
|
||||
ep_dir == USB_DIR_OUT &&
|
||||
ep_type == USB_ENDPOINT_XFER_INT) {
|
||||
|
||||
tx_endpoint = ep;
|
||||
vfd_ep_found = 1;
|
||||
if (debug)
|
||||
printk(KERN_INFO "%s: found VFD endpoint\n",
|
||||
__func__);
|
||||
}
|
||||
}
|
||||
|
||||
/* Input endpoint is mandatory */
|
||||
if (!ir_ep_found) {
|
||||
|
||||
err("%s: no valid input (IR) endpoint found.", __func__);
|
||||
retval = -ENODEV;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
if (!vfd_ep_found)
|
||||
printk(KERN_INFO "%s: no valid output (VFD) endpoint found.\n",
|
||||
__func__);
|
||||
|
||||
|
||||
/* Allocate memory */
|
||||
alloc_status = 0;
|
||||
|
||||
context = kzalloc(sizeof(struct sasem_context), GFP_KERNEL);
|
||||
if (!context) {
|
||||
err("%s: kzalloc failed for context", __func__);
|
||||
alloc_status = 1;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
|
||||
if (!driver) {
|
||||
err("%s: kzalloc failed for lirc_driver", __func__);
|
||||
alloc_status = 2;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
|
||||
if (!rbuf) {
|
||||
err("%s: kmalloc failed for lirc_buffer", __func__);
|
||||
alloc_status = 3;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) {
|
||||
err("%s: lirc_buffer_init failed", __func__);
|
||||
alloc_status = 4;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
if (!rx_urb) {
|
||||
err("%s: usb_alloc_urb failed for IR urb", __func__);
|
||||
alloc_status = 5;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
if (vfd_ep_found) {
|
||||
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
||||
if (!tx_urb) {
|
||||
err("%s: usb_alloc_urb failed for VFD urb",
|
||||
__func__);
|
||||
alloc_status = 6;
|
||||
goto alloc_status_switch;
|
||||
}
|
||||
}
|
||||
|
||||
mutex_init(&context->ctx_lock);
|
||||
|
||||
strcpy(driver->name, MOD_NAME);
|
||||
driver->minor = -1;
|
||||
driver->code_length = 64;
|
||||
driver->sample_rate = 0;
|
||||
driver->features = LIRC_CAN_REC_LIRCCODE;
|
||||
driver->data = context;
|
||||
driver->rbuf = rbuf;
|
||||
driver->set_use_inc = ir_open;
|
||||
driver->set_use_dec = ir_close;
|
||||
driver->dev = &interface->dev;
|
||||
driver->owner = THIS_MODULE;
|
||||
|
||||
mutex_lock(&context->ctx_lock);
|
||||
|
||||
lirc_minor = lirc_register_driver(driver);
|
||||
if (lirc_minor < 0) {
|
||||
err("%s: lirc_register_driver failed", __func__);
|
||||
alloc_status = 7;
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
} else
|
||||
printk(KERN_INFO "%s: Registered Sasem driver (minor:%d)\n",
|
||||
__func__, lirc_minor);
|
||||
|
||||
alloc_status_switch:
|
||||
|
||||
switch (alloc_status) {
|
||||
|
||||
case 7:
|
||||
if (vfd_ep_found)
|
||||
usb_free_urb(tx_urb);
|
||||
case 6:
|
||||
usb_free_urb(rx_urb);
|
||||
case 5:
|
||||
lirc_buffer_free(rbuf);
|
||||
case 4:
|
||||
kfree(rbuf);
|
||||
case 3:
|
||||
kfree(driver);
|
||||
case 2:
|
||||
kfree(context);
|
||||
context = NULL;
|
||||
case 1:
|
||||
retval = -ENOMEM;
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* Needed while unregistering! */
|
||||
driver->minor = lirc_minor;
|
||||
|
||||
context->dev = dev;
|
||||
context->dev_present = 1;
|
||||
context->rx_endpoint = rx_endpoint;
|
||||
context->rx_urb = rx_urb;
|
||||
if (vfd_ep_found) {
|
||||
context->tx_endpoint = tx_endpoint;
|
||||
context->tx_urb = tx_urb;
|
||||
context->vfd_contrast = 1000; /* range 0 - 1000 */
|
||||
}
|
||||
context->driver = driver;
|
||||
|
||||
usb_set_intfdata(interface, context);
|
||||
|
||||
if (vfd_ep_found) {
|
||||
|
||||
if (debug)
|
||||
printk(KERN_INFO "Registering VFD with sysfs\n");
|
||||
if (usb_register_dev(interface, &sasem_class))
|
||||
/* Not a fatal error, so ignore */
|
||||
printk(KERN_INFO "%s: could not get a minor number "
|
||||
"for VFD\n", __func__);
|
||||
}
|
||||
|
||||
printk(KERN_INFO "%s: Sasem device on usb<%d:%d> initialized\n",
|
||||
__func__, dev->bus->busnum, dev->devnum);
|
||||
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
exit:
|
||||
return retval;
|
||||
}
|
||||
|
||||
/**
|
||||
* Callback function for USB core API: disonnect
|
||||
*/
|
||||
static void sasem_disconnect(struct usb_interface *interface)
|
||||
{
|
||||
struct sasem_context *context;
|
||||
|
||||
/* prevent races with ir_open()/vfd_open() */
|
||||
mutex_lock(&disconnect_lock);
|
||||
|
||||
context = usb_get_intfdata(interface);
|
||||
mutex_lock(&context->ctx_lock);
|
||||
|
||||
printk(KERN_INFO "%s: Sasem device disconnected\n", __func__);
|
||||
|
||||
usb_set_intfdata(interface, NULL);
|
||||
context->dev_present = 0;
|
||||
|
||||
/* Stop reception */
|
||||
usb_kill_urb(context->rx_urb);
|
||||
|
||||
/* Abort ongoing write */
|
||||
if (atomic_read(&context->tx.busy)) {
|
||||
|
||||
usb_kill_urb(context->tx_urb);
|
||||
wait_for_completion(&context->tx.finished);
|
||||
}
|
||||
|
||||
/* De-register from lirc_dev if IR port is not open */
|
||||
if (!context->ir_isopen)
|
||||
deregister_from_lirc(context);
|
||||
|
||||
usb_deregister_dev(interface, &sasem_class);
|
||||
|
||||
mutex_unlock(&context->ctx_lock);
|
||||
|
||||
if (!context->ir_isopen && !context->vfd_isopen)
|
||||
delete_context(context);
|
||||
|
||||
mutex_unlock(&disconnect_lock);
|
||||
}
|
||||
|
||||
static int __init sasem_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
printk(KERN_INFO MOD_DESC ", v" MOD_VERSION "\n");
|
||||
printk(KERN_INFO MOD_AUTHOR "\n");
|
||||
|
||||
rc = usb_register(&sasem_driver);
|
||||
if (rc < 0) {
|
||||
err("%s: usb register failed (%d)", __func__, rc);
|
||||
return -ENODEV;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit sasem_exit(void)
|
||||
{
|
||||
usb_deregister(&sasem_driver);
|
||||
printk(KERN_INFO "module removed. Goodbye!\n");
|
||||
}
|
||||
|
||||
|
||||
module_init(sasem_init);
|
||||
module_exit(sasem_exit);
|
||||
Loading…
Reference in New Issue