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![Jarod Wilson](/assets/img/avatar_default.png)
Both lirc_imon and lirc_sasem were causing gcc to complain about the possible use of uninitialized variables. Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
1058 lines
25 KiB
C
1058 lines
25 KiB
C
/*
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* lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD
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* including the iMON PAD model
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*
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* Copyright(C) 2004 Venky Raju(dev@venky.ws)
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* Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com>
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*
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* lirc_imon 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., 675 Mass Ave, Cambridge, MA 02139, 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 "Venky Raju <dev@venky.ws>"
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#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
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#define MOD_NAME "lirc_imon"
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#define MOD_VERSION "0.8"
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#define DISPLAY_MINOR_BASE 144
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#define DEVICE_NAME "lcd%d"
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#define BUF_CHUNK_SIZE 4
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#define BUF_SIZE 128
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#define BIT_DURATION 250 /* each bit received is 250us */
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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 imon_probe(struct usb_interface *interface,
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const struct usb_device_id *id);
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static void imon_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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/* suspend/resume support */
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static int imon_resume(struct usb_interface *intf);
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static int imon_suspend(struct usb_interface *intf, pm_message_t message);
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/* Display file_operations function prototypes */
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static int display_open(struct inode *inode, struct file *file);
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static int display_close(struct inode *inode, struct file *file);
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/* VFD write operation */
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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 imon_init(void);
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static void __exit imon_exit(void);
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/*** G L O B A L S ***/
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#define IMON_DATA_BUF_SZ 35
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struct imon_context {
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struct usb_device *usbdev;
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/* Newer devices have two interfaces */
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int display; /* not all controllers do */
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int display_isopen; /* display port has been opened */
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int ir_isopen; /* IR port open */
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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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int vfd_proto_6p; /* some VFD require a 6th packet */
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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 rx_data {
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int count; /* length of 0 or 1 sequence */
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int prev_bit; /* logic level of sequence */
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int initial_space; /* initial space flag */
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} rx;
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struct tx_t {
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unsigned char data_buf[IMON_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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};
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static const struct file_operations display_fops = {
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.owner = THIS_MODULE,
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.open = &display_open,
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.write = &vfd_write,
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.release = &display_close,
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.llseek = noop_llseek,
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};
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/*
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* USB Device ID for iMON USB Control Boards
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*
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* The Windows drivers contain 6 different inf files, more or less one for
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* each new device until the 0x0034-0x0046 devices, which all use the same
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* driver. Some of the devices in the 34-46 range haven't been definitively
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* identified yet. Early devices have either a TriGem Computer, Inc. or a
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* Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
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* devices use the SoundGraph vendor ID (0x15c2).
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*/
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static struct usb_device_id imon_usb_id_table[] = {
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/* TriGem iMON (IR only) -- TG_iMON.inf */
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{ USB_DEVICE(0x0aa8, 0x8001) },
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/* SoundGraph iMON (IR only) -- sg_imon.inf */
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{ USB_DEVICE(0x04e8, 0xff30) },
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/* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
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{ USB_DEVICE(0x0aa8, 0xffda) },
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/* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
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{ USB_DEVICE(0x15c2, 0xffda) },
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{}
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};
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/* Some iMON VFD models requires a 6th packet for VFD writes */
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static struct usb_device_id vfd_proto_6p_list[] = {
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{ USB_DEVICE(0x15c2, 0xffda) },
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{}
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};
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/* Some iMON devices have no lcd/vfd, don't set one up */
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static struct usb_device_id ir_only_list[] = {
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{ USB_DEVICE(0x0aa8, 0x8001) },
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{ USB_DEVICE(0x04e8, 0xff30) },
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{}
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};
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/* USB Device data */
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static struct usb_driver imon_driver = {
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.name = MOD_NAME,
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.probe = imon_probe,
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.disconnect = imon_disconnect,
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.suspend = imon_suspend,
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.resume = imon_resume,
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.id_table = imon_usb_id_table,
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};
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static struct usb_class_driver imon_class = {
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.name = DEVICE_NAME,
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.fops = &display_fops,
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.minor_base = DISPLAY_MINOR_BASE,
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};
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/* to prevent races between open() and disconnect(), probing, etc */
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static DEFINE_MUTEX(driver_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_VERSION(MOD_VERSION);
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
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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 free_imon_context(struct imon_context *context)
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{
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struct device *dev = context->driver->dev;
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usb_free_urb(context->tx_urb);
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usb_free_urb(context->rx_urb);
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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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dev_dbg(dev, "%s: iMON context freed\n", __func__);
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}
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static void deregister_from_lirc(struct imon_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 MOD_NAME ": Deregistered iMON driver "
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"(minor:%d)\n", minor);
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}
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/**
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* Called when the Display device (e.g. /dev/lcd0)
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* is opened by the application.
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*/
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static int display_open(struct inode *inode, struct file *file)
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{
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struct usb_interface *interface;
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struct imon_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(&driver_lock);
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subminor = iminor(inode);
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interface = usb_find_interface(&imon_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->display) {
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err("%s: display not supported by device", __func__);
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retval = -ENODEV;
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} else if (context->display_isopen) {
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err("%s: display port is already open", __func__);
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retval = -EBUSY;
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} else {
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context->display_isopen = 1;
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file->private_data = context;
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dev_info(context->driver->dev, "display 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(&driver_lock);
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return retval;
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}
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/**
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* Called when the display device (e.g. /dev/lcd0)
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* is closed by the application.
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*/
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static int display_close(struct inode *inode, struct file *file)
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{
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struct imon_context *context = NULL;
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int retval = 0;
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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->display) {
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err("%s: display not supported by device", __func__);
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retval = -ENODEV;
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} else if (!context->display_isopen) {
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err("%s: display is not open", __func__);
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retval = -EIO;
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} else {
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context->display_isopen = 0;
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dev_info(context->driver->dev, "display port closed\n");
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if (!context->dev_present && !context->ir_isopen) {
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/*
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* Device disconnected before close and IR port is not
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* open. If IR port is open, context will be deleted by
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* ir_close.
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*/
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mutex_unlock(&context->ctx_lock);
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free_imon_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 device -- this function must be called
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* with context->ctx_lock held.
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*/
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static int send_packet(struct imon_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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/* Check if we need to use control or interrupt urb */
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pipe = usb_sndintpipe(context->usbdev,
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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->usbdev, pipe,
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context->usb_tx_buf,
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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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retval = wait_for_completion_interruptible(
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&context->tx.finished);
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if (retval)
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err("%s: task interrupted", __func__);
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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 iMON VFD is 2x16 characters
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* and requires data in 5 consecutive USB interrupt packets,
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* each packet but the last carrying 7 bytes.
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*
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* I don't know if the VFD board supports features such as
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* scrolling, clearing rows, blanking, etc. so at
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* the caller must provide a full screen of data. If fewer
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* than 32 bytes are provided spaces will be appended to
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* generate a full screen.
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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 offset;
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int seq;
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int retval = 0;
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struct imon_context *context;
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const unsigned char vfd_packet6[] = {
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0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
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int *data_buf = NULL;
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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 iMON 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 > IMON_DATA_BUF_SZ - 3) {
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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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data_buf = memdup_user(buf, n_bytes);
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if (IS_ERR(data_buf)) {
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retval = PTR_ERR(data_buf);
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goto exit;
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}
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memcpy(context->tx.data_buf, data_buf, n_bytes);
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/* Pad with spaces */
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for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
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context->tx.data_buf[i] = ' ';
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for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
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context->tx.data_buf[i] = 0xFF;
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offset = 0;
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seq = 0;
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do {
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memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
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context->usb_tx_buf[7] = (unsigned char) seq;
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|
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retval = send_packet(context);
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if (retval) {
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err("%s: send packet failed for packet #%d",
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__func__, seq/2);
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goto exit;
|
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} else {
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seq += 2;
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offset += 7;
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}
|
|
|
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} while (offset < IMON_DATA_BUF_SZ);
|
|
|
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if (context->vfd_proto_6p) {
|
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/* Send packet #6 */
|
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memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
|
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context->usb_tx_buf[7] = (unsigned char) seq;
|
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retval = send_packet(context);
|
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if (retval)
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err("%s: send packet failed for packet #%d",
|
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__func__, seq/2);
|
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}
|
|
|
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exit:
|
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mutex_unlock(&context->ctx_lock);
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kfree(data_buf);
|
|
|
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return (!retval) ? n_bytes : retval;
|
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}
|
|
|
|
/**
|
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* Callback function for USB core API: transmit data
|
|
*/
|
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static void usb_tx_callback(struct urb *urb)
|
|
{
|
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struct imon_context *context;
|
|
|
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if (!urb)
|
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return;
|
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context = (struct imon_context *)urb->context;
|
|
if (!context)
|
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return;
|
|
|
|
context->tx.status = urb->status;
|
|
|
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/* notify waiters that write has finished */
|
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atomic_set(&context->tx.busy, 0);
|
|
complete(&context->tx.finished);
|
|
|
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return;
|
|
}
|
|
|
|
/**
|
|
* Called by lirc_dev when the application opens /dev/lirc
|
|
*/
|
|
static int ir_open(void *data)
|
|
{
|
|
int retval = 0;
|
|
struct imon_context *context;
|
|
|
|
/* prevent races with disconnect */
|
|
mutex_lock(&driver_lock);
|
|
|
|
context = (struct imon_context *)data;
|
|
|
|
/* initial IR protocol decode variables */
|
|
context->rx.count = 0;
|
|
context->rx.initial_space = 1;
|
|
context->rx.prev_bit = 0;
|
|
|
|
context->ir_isopen = 1;
|
|
dev_info(context->driver->dev, "IR port opened\n");
|
|
|
|
mutex_unlock(&driver_lock);
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* Called by lirc_dev when the application closes /dev/lirc
|
|
*/
|
|
static void ir_close(void *data)
|
|
{
|
|
struct imon_context *context;
|
|
|
|
context = (struct imon_context *)data;
|
|
if (!context) {
|
|
err("%s: no context for device", __func__);
|
|
return;
|
|
}
|
|
|
|
mutex_lock(&context->ctx_lock);
|
|
|
|
context->ir_isopen = 0;
|
|
dev_info(context->driver->dev, "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->display_isopen) {
|
|
mutex_unlock(&context->ctx_lock);
|
|
free_imon_context(context);
|
|
return;
|
|
}
|
|
/*
|
|
* If display port is open, context will be deleted by
|
|
* display_close
|
|
*/
|
|
}
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Convert bit count to time duration (in us) and submit
|
|
* the value to lirc_dev.
|
|
*/
|
|
static void submit_data(struct imon_context *context)
|
|
{
|
|
unsigned char buf[4];
|
|
int value = context->rx.count;
|
|
int i;
|
|
|
|
dev_dbg(context->driver->dev, "submitting data to LIRC\n");
|
|
|
|
value *= BIT_DURATION;
|
|
value &= PULSE_MASK;
|
|
if (context->rx.prev_bit)
|
|
value |= PULSE_BIT;
|
|
|
|
for (i = 0; i < 4; ++i)
|
|
buf[i] = value>>(i*8);
|
|
|
|
lirc_buffer_write(context->driver->rbuf, buf);
|
|
wake_up(&context->driver->rbuf->wait_poll);
|
|
return;
|
|
}
|
|
|
|
static inline int tv2int(const struct timeval *a, const struct timeval *b)
|
|
{
|
|
int usecs = 0;
|
|
int sec = 0;
|
|
|
|
if (b->tv_usec > a->tv_usec) {
|
|
usecs = 1000000;
|
|
sec--;
|
|
}
|
|
|
|
usecs += a->tv_usec - b->tv_usec;
|
|
|
|
sec += a->tv_sec - b->tv_sec;
|
|
sec *= 1000;
|
|
usecs /= 1000;
|
|
sec += usecs;
|
|
|
|
if (sec < 0)
|
|
sec = 1000;
|
|
|
|
return sec;
|
|
}
|
|
|
|
/**
|
|
* Process the incoming packet
|
|
*/
|
|
static void imon_incoming_packet(struct imon_context *context,
|
|
struct urb *urb, int intf)
|
|
{
|
|
int len = urb->actual_length;
|
|
unsigned char *buf = urb->transfer_buffer;
|
|
struct device *dev = context->driver->dev;
|
|
int octet, bit;
|
|
unsigned char mask;
|
|
int i;
|
|
|
|
/*
|
|
* just bail out if no listening IR client
|
|
*/
|
|
if (!context->ir_isopen)
|
|
return;
|
|
|
|
if (len != 8) {
|
|
dev_warn(dev, "imon %s: invalid incoming packet "
|
|
"size (len = %d, intf%d)\n", __func__, len, intf);
|
|
return;
|
|
}
|
|
|
|
if (debug) {
|
|
printk(KERN_INFO "raw packet: ");
|
|
for (i = 0; i < len; ++i)
|
|
printk("%02x ", buf[i]);
|
|
printk("\n");
|
|
}
|
|
|
|
/*
|
|
* Translate received data to pulse and space lengths.
|
|
* Received data is active low, i.e. pulses are 0 and
|
|
* spaces are 1.
|
|
*
|
|
* My original algorithm was essentially similar to
|
|
* Changwoo Ryu's with the exception that he switched
|
|
* the incoming bits to active high and also fed an
|
|
* initial space to LIRC at the start of a new sequence
|
|
* if the previous bit was a pulse.
|
|
*
|
|
* I've decided to adopt his algorithm.
|
|
*/
|
|
|
|
if (buf[7] == 1 && context->rx.initial_space) {
|
|
/* LIRC requires a leading space */
|
|
context->rx.prev_bit = 0;
|
|
context->rx.count = 4;
|
|
submit_data(context);
|
|
context->rx.count = 0;
|
|
}
|
|
|
|
for (octet = 0; octet < 5; ++octet) {
|
|
mask = 0x80;
|
|
for (bit = 0; bit < 8; ++bit) {
|
|
int curr_bit = !(buf[octet] & mask);
|
|
if (curr_bit != context->rx.prev_bit) {
|
|
if (context->rx.count) {
|
|
submit_data(context);
|
|
context->rx.count = 0;
|
|
}
|
|
context->rx.prev_bit = curr_bit;
|
|
}
|
|
++context->rx.count;
|
|
mask >>= 1;
|
|
}
|
|
}
|
|
|
|
if (buf[7] == 10) {
|
|
if (context->rx.count) {
|
|
submit_data(context);
|
|
context->rx.count = 0;
|
|
}
|
|
context->rx.initial_space = context->rx.prev_bit;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Callback function for USB core API: receive data
|
|
*/
|
|
static void usb_rx_callback(struct urb *urb)
|
|
{
|
|
struct imon_context *context;
|
|
unsigned char *buf;
|
|
int len;
|
|
int intfnum = 0;
|
|
|
|
if (!urb)
|
|
return;
|
|
|
|
context = (struct imon_context *)urb->context;
|
|
if (!context)
|
|
return;
|
|
|
|
buf = urb->transfer_buffer;
|
|
len = urb->actual_length;
|
|
|
|
switch (urb->status) {
|
|
case -ENOENT: /* usbcore unlink successful! */
|
|
return;
|
|
|
|
case 0:
|
|
imon_incoming_packet(context, urb, intfnum);
|
|
break;
|
|
|
|
default:
|
|
dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n",
|
|
__func__, urb->status);
|
|
break;
|
|
}
|
|
|
|
usb_submit_urb(context->rx_urb, GFP_ATOMIC);
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Callback function for USB core API: Probe
|
|
*/
|
|
static int imon_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *usbdev = 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;
|
|
struct device *dev = &interface->dev;
|
|
int ifnum;
|
|
int lirc_minor = 0;
|
|
int num_endpts;
|
|
int retval = 0;
|
|
int display_ep_found = 0;
|
|
int ir_ep_found = 0;
|
|
int alloc_status = 0;
|
|
int vfd_proto_6p = 0;
|
|
int code_length;
|
|
struct imon_context *context = NULL;
|
|
int i;
|
|
u16 vendor, product;
|
|
|
|
context = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
|
|
if (!context) {
|
|
err("%s: kzalloc failed for context", __func__);
|
|
alloc_status = 1;
|
|
goto alloc_status_switch;
|
|
}
|
|
|
|
/*
|
|
* Try to auto-detect the type of display if the user hasn't set
|
|
* it by hand via the display_type modparam. Default is VFD.
|
|
*/
|
|
if (usb_match_id(interface, ir_only_list))
|
|
context->display = 0;
|
|
else
|
|
context->display = 1;
|
|
|
|
code_length = BUF_CHUNK_SIZE * 8;
|
|
|
|
usbdev = usb_get_dev(interface_to_usbdev(interface));
|
|
iface_desc = interface->cur_altsetting;
|
|
num_endpts = iface_desc->desc.bNumEndpoints;
|
|
ifnum = iface_desc->desc.bInterfaceNumber;
|
|
vendor = le16_to_cpu(usbdev->descriptor.idVendor);
|
|
product = le16_to_cpu(usbdev->descriptor.idProduct);
|
|
|
|
dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
|
|
__func__, vendor, product, ifnum);
|
|
|
|
/* prevent races probing devices w/multiple interfaces */
|
|
mutex_lock(&driver_lock);
|
|
|
|
/*
|
|
* Scan the endpoint list and set:
|
|
* first input endpoint = IR endpoint
|
|
* first output endpoint = display endpoint
|
|
*/
|
|
for (i = 0; i < num_endpts && !(ir_ep_found && display_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;
|
|
dev_dbg(dev, "%s: found IR endpoint\n", __func__);
|
|
|
|
} else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
|
|
ep_type == USB_ENDPOINT_XFER_INT) {
|
|
tx_endpoint = ep;
|
|
display_ep_found = 1;
|
|
dev_dbg(dev, "%s: found display endpoint\n", __func__);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Some iMON receivers have no display. Unfortunately, it seems
|
|
* that SoundGraph recycles device IDs between devices both with
|
|
* and without... :\
|
|
*/
|
|
if (context->display == 0) {
|
|
display_ep_found = 0;
|
|
dev_dbg(dev, "%s: device has no display\n", __func__);
|
|
}
|
|
|
|
/* Input endpoint is mandatory */
|
|
if (!ir_ep_found) {
|
|
err("%s: no valid input (IR) endpoint found.", __func__);
|
|
retval = -ENODEV;
|
|
alloc_status = 2;
|
|
goto alloc_status_switch;
|
|
}
|
|
|
|
/* Determine if display requires 6 packets */
|
|
if (display_ep_found) {
|
|
if (usb_match_id(interface, vfd_proto_6p_list))
|
|
vfd_proto_6p = 1;
|
|
|
|
dev_dbg(dev, "%s: vfd_proto_6p: %d\n",
|
|
__func__, vfd_proto_6p);
|
|
}
|
|
|
|
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;
|
|
}
|
|
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!tx_urb) {
|
|
err("%s: usb_alloc_urb failed for display urb",
|
|
__func__);
|
|
alloc_status = 6;
|
|
goto alloc_status_switch;
|
|
}
|
|
|
|
mutex_init(&context->ctx_lock);
|
|
context->vfd_proto_6p = vfd_proto_6p;
|
|
|
|
strcpy(driver->name, MOD_NAME);
|
|
driver->minor = -1;
|
|
driver->code_length = sizeof(int) * 8;
|
|
driver->sample_rate = 0;
|
|
driver->features = LIRC_CAN_REC_MODE2;
|
|
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);
|
|
|
|
context->driver = driver;
|
|
/* start out in keyboard mode */
|
|
|
|
lirc_minor = lirc_register_driver(driver);
|
|
if (lirc_minor < 0) {
|
|
err("%s: lirc_register_driver failed", __func__);
|
|
alloc_status = 7;
|
|
goto unlock;
|
|
} else
|
|
dev_info(dev, "Registered iMON driver "
|
|
"(lirc minor: %d)\n", lirc_minor);
|
|
|
|
/* Needed while unregistering! */
|
|
driver->minor = lirc_minor;
|
|
|
|
context->usbdev = usbdev;
|
|
context->dev_present = 1;
|
|
context->rx_endpoint = rx_endpoint;
|
|
context->rx_urb = rx_urb;
|
|
|
|
/*
|
|
* tx is used to send characters to lcd/vfd, associate RF
|
|
* remotes, set IR protocol, and maybe more...
|
|
*/
|
|
context->tx_endpoint = tx_endpoint;
|
|
context->tx_urb = tx_urb;
|
|
|
|
if (display_ep_found)
|
|
context->display = 1;
|
|
|
|
usb_fill_int_urb(context->rx_urb, context->usbdev,
|
|
usb_rcvintpipe(context->usbdev,
|
|
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 intf0 (%d)",
|
|
__func__, retval);
|
|
mutex_unlock(&context->ctx_lock);
|
|
goto exit;
|
|
}
|
|
|
|
usb_set_intfdata(interface, context);
|
|
|
|
if (context->display && ifnum == 0) {
|
|
dev_dbg(dev, "%s: Registering iMON display with sysfs\n",
|
|
__func__);
|
|
|
|
if (usb_register_dev(interface, &imon_class)) {
|
|
/* Not a fatal error, so ignore */
|
|
dev_info(dev, "%s: could not get a minor number for "
|
|
"display\n", __func__);
|
|
}
|
|
}
|
|
|
|
dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
|
|
"usb<%d:%d> initialized\n", vendor, product, ifnum,
|
|
usbdev->bus->busnum, usbdev->devnum);
|
|
|
|
unlock:
|
|
mutex_unlock(&context->ctx_lock);
|
|
alloc_status_switch:
|
|
|
|
switch (alloc_status) {
|
|
case 7:
|
|
usb_free_urb(tx_urb);
|
|
case 6:
|
|
usb_free_urb(rx_urb);
|
|
case 5:
|
|
if (rbuf)
|
|
lirc_buffer_free(rbuf);
|
|
case 4:
|
|
kfree(rbuf);
|
|
case 3:
|
|
kfree(driver);
|
|
case 2:
|
|
kfree(context);
|
|
context = NULL;
|
|
case 1:
|
|
if (retval != -ENODEV)
|
|
retval = -ENOMEM;
|
|
break;
|
|
case 0:
|
|
retval = 0;
|
|
}
|
|
|
|
exit:
|
|
mutex_unlock(&driver_lock);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* Callback function for USB core API: disconnect
|
|
*/
|
|
static void imon_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct imon_context *context;
|
|
int ifnum;
|
|
|
|
/* prevent races with ir_open()/display_open() */
|
|
mutex_lock(&driver_lock);
|
|
|
|
context = usb_get_intfdata(interface);
|
|
ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
|
|
|
|
mutex_lock(&context->ctx_lock);
|
|
|
|
usb_set_intfdata(interface, NULL);
|
|
|
|
/* Abort ongoing write */
|
|
if (atomic_read(&context->tx.busy)) {
|
|
usb_kill_urb(context->tx_urb);
|
|
complete_all(&context->tx.finished);
|
|
}
|
|
|
|
context->dev_present = 0;
|
|
usb_kill_urb(context->rx_urb);
|
|
if (context->display)
|
|
usb_deregister_dev(interface, &imon_class);
|
|
|
|
if (!context->ir_isopen && !context->dev_present) {
|
|
deregister_from_lirc(context);
|
|
mutex_unlock(&context->ctx_lock);
|
|
if (!context->display_isopen)
|
|
free_imon_context(context);
|
|
} else
|
|
mutex_unlock(&context->ctx_lock);
|
|
|
|
mutex_unlock(&driver_lock);
|
|
|
|
printk(KERN_INFO "%s: iMON device (intf%d) disconnected\n",
|
|
__func__, ifnum);
|
|
}
|
|
|
|
static int imon_suspend(struct usb_interface *intf, pm_message_t message)
|
|
{
|
|
struct imon_context *context = usb_get_intfdata(intf);
|
|
|
|
usb_kill_urb(context->rx_urb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int imon_resume(struct usb_interface *intf)
|
|
{
|
|
int rc = 0;
|
|
struct imon_context *context = usb_get_intfdata(intf);
|
|
|
|
usb_fill_int_urb(context->rx_urb, context->usbdev,
|
|
usb_rcvintpipe(context->usbdev,
|
|
context->rx_endpoint->bEndpointAddress),
|
|
context->usb_rx_buf, sizeof(context->usb_rx_buf),
|
|
usb_rx_callback, context,
|
|
context->rx_endpoint->bInterval);
|
|
|
|
rc = usb_submit_urb(context->rx_urb, GFP_ATOMIC);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int __init imon_init(void)
|
|
{
|
|
int rc;
|
|
|
|
printk(KERN_INFO MOD_NAME ": " MOD_DESC ", v" MOD_VERSION "\n");
|
|
|
|
rc = usb_register(&imon_driver);
|
|
if (rc) {
|
|
err("%s: usb register failed(%d)", __func__, rc);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit imon_exit(void)
|
|
{
|
|
usb_deregister(&imon_driver);
|
|
printk(KERN_INFO MOD_NAME ": module removed. Goodbye!\n");
|
|
}
|
|
|
|
module_init(imon_init);
|
|
module_exit(imon_exit);
|