2010-07-26 17:29:43 -06:00
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/*
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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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2010-07-27 15:44:45 -06:00
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static const struct file_operations display_fops = {
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2010-07-26 17:29:43 -06:00
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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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llseek: automatically add .llseek fop
All file_operations should get a .llseek operation so we can make
nonseekable_open the default for future file operations without a
.llseek pointer.
The three cases that we can automatically detect are no_llseek, seq_lseek
and default_llseek. For cases where we can we can automatically prove that
the file offset is always ignored, we use noop_llseek, which maintains
the current behavior of not returning an error from a seek.
New drivers should normally not use noop_llseek but instead use no_llseek
and call nonseekable_open at open time. Existing drivers can be converted
to do the same when the maintainer knows for certain that no user code
relies on calling seek on the device file.
The generated code is often incorrectly indented and right now contains
comments that clarify for each added line why a specific variant was
chosen. In the version that gets submitted upstream, the comments will
be gone and I will manually fix the indentation, because there does not
seem to be a way to do that using coccinelle.
Some amount of new code is currently sitting in linux-next that should get
the same modifications, which I will do at the end of the merge window.
Many thanks to Julia Lawall for helping me learn to write a semantic
patch that does all this.
===== begin semantic patch =====
// This adds an llseek= method to all file operations,
// as a preparation for making no_llseek the default.
//
// The rules are
// - use no_llseek explicitly if we do nonseekable_open
// - use seq_lseek for sequential files
// - use default_llseek if we know we access f_pos
// - use noop_llseek if we know we don't access f_pos,
// but we still want to allow users to call lseek
//
@ open1 exists @
identifier nested_open;
@@
nested_open(...)
{
<+...
nonseekable_open(...)
...+>
}
@ open exists@
identifier open_f;
identifier i, f;
identifier open1.nested_open;
@@
int open_f(struct inode *i, struct file *f)
{
<+...
(
nonseekable_open(...)
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nested_open(...)
)
...+>
}
@ read disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
<+...
(
*off = E
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*off += E
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func(..., off, ...)
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E = *off
)
...+>
}
@ read_no_fpos disable optional_qualifier exists @
identifier read_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t read_f(struct file *f, char *p, size_t s, loff_t *off)
{
... when != off
}
@ write @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
expression E;
identifier func;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
<+...
(
*off = E
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*off += E
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func(..., off, ...)
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E = *off
)
...+>
}
@ write_no_fpos @
identifier write_f;
identifier f, p, s, off;
type ssize_t, size_t, loff_t;
@@
ssize_t write_f(struct file *f, const char *p, size_t s, loff_t *off)
{
... when != off
}
@ fops0 @
identifier fops;
@@
struct file_operations fops = {
...
};
@ has_llseek depends on fops0 @
identifier fops0.fops;
identifier llseek_f;
@@
struct file_operations fops = {
...
.llseek = llseek_f,
...
};
@ has_read depends on fops0 @
identifier fops0.fops;
identifier read_f;
@@
struct file_operations fops = {
...
.read = read_f,
...
};
@ has_write depends on fops0 @
identifier fops0.fops;
identifier write_f;
@@
struct file_operations fops = {
...
.write = write_f,
...
};
@ has_open depends on fops0 @
identifier fops0.fops;
identifier open_f;
@@
struct file_operations fops = {
...
.open = open_f,
...
};
// use no_llseek if we call nonseekable_open
////////////////////////////////////////////
@ nonseekable1 depends on !has_llseek && has_open @
identifier fops0.fops;
identifier nso ~= "nonseekable_open";
@@
struct file_operations fops = {
... .open = nso, ...
+.llseek = no_llseek, /* nonseekable */
};
@ nonseekable2 depends on !has_llseek @
identifier fops0.fops;
identifier open.open_f;
@@
struct file_operations fops = {
... .open = open_f, ...
+.llseek = no_llseek, /* open uses nonseekable */
};
// use seq_lseek for sequential files
/////////////////////////////////////
@ seq depends on !has_llseek @
identifier fops0.fops;
identifier sr ~= "seq_read";
@@
struct file_operations fops = {
... .read = sr, ...
+.llseek = seq_lseek, /* we have seq_read */
};
// use default_llseek if there is a readdir
///////////////////////////////////////////
@ fops1 depends on !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier readdir_e;
@@
// any other fop is used that changes pos
struct file_operations fops = {
... .readdir = readdir_e, ...
+.llseek = default_llseek, /* readdir is present */
};
// use default_llseek if at least one of read/write touches f_pos
/////////////////////////////////////////////////////////////////
@ fops2 depends on !fops1 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read.read_f;
@@
// read fops use offset
struct file_operations fops = {
... .read = read_f, ...
+.llseek = default_llseek, /* read accesses f_pos */
};
@ fops3 depends on !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write.write_f;
@@
// write fops use offset
struct file_operations fops = {
... .write = write_f, ...
+ .llseek = default_llseek, /* write accesses f_pos */
};
// Use noop_llseek if neither read nor write accesses f_pos
///////////////////////////////////////////////////////////
@ fops4 depends on !fops1 && !fops2 && !fops3 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
identifier write_no_fpos.write_f;
@@
// write fops use offset
struct file_operations fops = {
...
.write = write_f,
.read = read_f,
...
+.llseek = noop_llseek, /* read and write both use no f_pos */
};
@ depends on has_write && !has_read && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier write_no_fpos.write_f;
@@
struct file_operations fops = {
... .write = write_f, ...
+.llseek = noop_llseek, /* write uses no f_pos */
};
@ depends on has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
identifier read_no_fpos.read_f;
@@
struct file_operations fops = {
... .read = read_f, ...
+.llseek = noop_llseek, /* read uses no f_pos */
};
@ depends on !has_read && !has_write && !fops1 && !fops2 && !has_llseek && !nonseekable1 && !nonseekable2 && !seq @
identifier fops0.fops;
@@
struct file_operations fops = {
...
+.llseek = noop_llseek, /* no read or write fn */
};
===== End semantic patch =====
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Julia Lawall <julia@diku.dk>
Cc: Christoph Hellwig <hch@infradead.org>
2010-08-15 10:52:59 -06:00
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.release = &display_close,
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.llseek = noop_llseek,
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2010-07-26 17:29:43 -06:00
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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);
|
|
|
|
|
|
|
|
if (!context->display) {
|
|
|
|
err("%s: display not supported by device", __func__);
|
|
|
|
retval = -ENODEV;
|
|
|
|
} else if (context->display_isopen) {
|
|
|
|
err("%s: display port is already open", __func__);
|
|
|
|
retval = -EBUSY;
|
|
|
|
} else {
|
|
|
|
context->display_isopen = 1;
|
|
|
|
file->private_data = context;
|
|
|
|
dev_info(context->driver->dev, "display port opened\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
|
|
|
|
|
|
|
exit:
|
|
|
|
mutex_unlock(&driver_lock);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Called when the display device (e.g. /dev/lcd0)
|
|
|
|
* is closed by the application.
|
|
|
|
*/
|
|
|
|
static int display_close(struct inode *inode, struct file *file)
|
|
|
|
{
|
|
|
|
struct imon_context *context = NULL;
|
|
|
|
int retval = 0;
|
|
|
|
|
2010-09-04 19:52:47 -06:00
|
|
|
context = file->private_data;
|
2010-07-26 17:29:43 -06:00
|
|
|
|
|
|
|
if (!context) {
|
|
|
|
err("%s: no context for device", __func__);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_lock(&context->ctx_lock);
|
|
|
|
|
|
|
|
if (!context->display) {
|
|
|
|
err("%s: display not supported by device", __func__);
|
|
|
|
retval = -ENODEV;
|
|
|
|
} else if (!context->display_isopen) {
|
|
|
|
err("%s: display is not open", __func__);
|
|
|
|
retval = -EIO;
|
|
|
|
} else {
|
|
|
|
context->display_isopen = 0;
|
|
|
|
dev_info(context->driver->dev, "display port closed\n");
|
|
|
|
if (!context->dev_present && !context->ir_isopen) {
|
|
|
|
/*
|
|
|
|
* Device disconnected before close and IR port is not
|
|
|
|
* open. If IR port is open, context will be deleted by
|
|
|
|
* ir_close.
|
|
|
|
*/
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
|
|
|
free_imon_context(context);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Sends a packet to the device -- this function must be called
|
|
|
|
* with context->ctx_lock held.
|
|
|
|
*/
|
|
|
|
static int send_packet(struct imon_context *context)
|
|
|
|
{
|
|
|
|
unsigned int pipe;
|
|
|
|
int interval = 0;
|
|
|
|
int retval = 0;
|
|
|
|
|
|
|
|
/* Check if we need to use control or interrupt urb */
|
|
|
|
pipe = usb_sndintpipe(context->usbdev,
|
|
|
|
context->tx_endpoint->bEndpointAddress);
|
|
|
|
interval = context->tx_endpoint->bInterval;
|
|
|
|
|
|
|
|
usb_fill_int_urb(context->tx_urb, context->usbdev, pipe,
|
|
|
|
context->usb_tx_buf,
|
|
|
|
sizeof(context->usb_tx_buf),
|
|
|
|
usb_tx_callback, context, interval);
|
|
|
|
|
|
|
|
context->tx_urb->actual_length = 0;
|
|
|
|
|
|
|
|
init_completion(&context->tx.finished);
|
|
|
|
atomic_set(&(context->tx.busy), 1);
|
|
|
|
|
|
|
|
retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
|
|
|
|
if (retval) {
|
|
|
|
atomic_set(&(context->tx.busy), 0);
|
|
|
|
err("%s: error submitting urb(%d)", __func__, retval);
|
|
|
|
} else {
|
|
|
|
/* Wait for transmission to complete (or abort) */
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
|
|
|
retval = wait_for_completion_interruptible(
|
|
|
|
&context->tx.finished);
|
|
|
|
if (retval)
|
|
|
|
err("%s: task interrupted", __func__);
|
|
|
|
mutex_lock(&context->ctx_lock);
|
|
|
|
|
|
|
|
retval = context->tx.status;
|
|
|
|
if (retval)
|
|
|
|
err("%s: packet tx failed (%d)", __func__, retval);
|
|
|
|
}
|
|
|
|
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Writes data to the VFD. The iMON VFD is 2x16 characters
|
|
|
|
* and requires data in 5 consecutive USB interrupt packets,
|
|
|
|
* each packet but the last carrying 7 bytes.
|
|
|
|
*
|
|
|
|
* I don't know if the VFD board supports features such as
|
|
|
|
* scrolling, clearing rows, blanking, etc. so at
|
|
|
|
* the caller must provide a full screen of data. If fewer
|
|
|
|
* than 32 bytes are provided spaces will be appended to
|
|
|
|
* generate a full screen.
|
|
|
|
*/
|
|
|
|
static ssize_t vfd_write(struct file *file, const char *buf,
|
|
|
|
size_t n_bytes, loff_t *pos)
|
|
|
|
{
|
|
|
|
int i;
|
|
|
|
int offset;
|
|
|
|
int seq;
|
|
|
|
int retval = 0;
|
|
|
|
struct imon_context *context;
|
|
|
|
const unsigned char vfd_packet6[] = {
|
|
|
|
0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
|
2011-03-04 13:57:24 -07:00
|
|
|
int *data_buf = NULL;
|
2010-07-26 17:29:43 -06:00
|
|
|
|
2010-09-04 19:52:47 -06:00
|
|
|
context = file->private_data;
|
2010-07-26 17:29:43 -06:00
|
|
|
if (!context) {
|
|
|
|
err("%s: no context for device", __func__);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_lock(&context->ctx_lock);
|
|
|
|
|
|
|
|
if (!context->dev_present) {
|
|
|
|
err("%s: no iMON device present", __func__);
|
|
|
|
retval = -ENODEV;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) {
|
|
|
|
err("%s: invalid payload size", __func__);
|
|
|
|
retval = -EINVAL;
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
data_buf = memdup_user(buf, n_bytes);
|
|
|
|
if (IS_ERR(data_buf)) {
|
|
|
|
retval = PTR_ERR(data_buf);
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(context->tx.data_buf, data_buf, n_bytes);
|
|
|
|
|
|
|
|
/* Pad with spaces */
|
|
|
|
for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
|
|
|
|
context->tx.data_buf[i] = ' ';
|
|
|
|
|
|
|
|
for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
|
|
|
|
context->tx.data_buf[i] = 0xFF;
|
|
|
|
|
|
|
|
offset = 0;
|
|
|
|
seq = 0;
|
|
|
|
|
|
|
|
do {
|
|
|
|
memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
|
|
|
|
context->usb_tx_buf[7] = (unsigned char) seq;
|
|
|
|
|
|
|
|
retval = send_packet(context);
|
|
|
|
if (retval) {
|
|
|
|
err("%s: send packet failed for packet #%d",
|
|
|
|
__func__, seq/2);
|
|
|
|
goto exit;
|
|
|
|
} else {
|
|
|
|
seq += 2;
|
|
|
|
offset += 7;
|
|
|
|
}
|
|
|
|
|
|
|
|
} while (offset < IMON_DATA_BUF_SZ);
|
|
|
|
|
|
|
|
if (context->vfd_proto_6p) {
|
|
|
|
/* Send packet #6 */
|
|
|
|
memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
|
|
|
|
context->usb_tx_buf[7] = (unsigned char) seq;
|
|
|
|
retval = send_packet(context);
|
|
|
|
if (retval)
|
|
|
|
err("%s: send packet failed for packet #%d",
|
|
|
|
__func__, seq/2);
|
|
|
|
}
|
|
|
|
|
|
|
|
exit:
|
|
|
|
mutex_unlock(&context->ctx_lock);
|
2011-01-17 12:02:00 -07:00
|
|
|
kfree(data_buf);
|
2010-07-26 17:29:43 -06:00
|
|
|
|
|
|
|
return (!retval) ? n_bytes : retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Callback function for USB core API: transmit data
|
|
|
|
*/
|
|
|
|
static void usb_tx_callback(struct urb *urb)
|
|
|
|
{
|
|
|
|
struct imon_context *context;
|
|
|
|
|
|
|
|
if (!urb)
|
|
|
|
return;
|
|
|
|
context = (struct imon_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 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;
|
2010-08-17 15:41:08 -06:00
|
|
|
int i;
|
2010-07-26 17:29:43 -06:00
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-08-17 15:41:08 -06:00
|
|
|
if (buf[7] == 10) {
|
2010-07-26 17:29:43 -06:00
|
|
|
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;
|
|
|
|
int intfnum = 0;
|
|
|
|
|
|
|
|
if (!urb)
|
|
|
|
return;
|
|
|
|
|
|
|
|
context = (struct imon_context *)urb->context;
|
|
|
|
if (!context)
|
|
|
|
return;
|
|
|
|
|
|
|
|
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;
|
|
|
|
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;
|
|
|
|
|
|
|
|
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;
|
2011-05-27 12:37:23 -06:00
|
|
|
driver->code_length = BUF_CHUNK_SIZE * 8;
|
2010-07-26 17:29:43 -06:00
|
|
|
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;
|
2010-09-04 06:32:25 -06:00
|
|
|
goto unlock;
|
2010-07-26 17:29:43 -06:00
|
|
|
} 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);
|
|
|
|
|
2010-09-04 06:32:25 -06:00
|
|
|
unlock:
|
2010-07-26 17:29:43 -06:00
|
|
|
mutex_unlock(&context->ctx_lock);
|
2010-09-04 06:32:25 -06:00
|
|
|
alloc_status_switch:
|
2010-07-26 17:29:43 -06:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
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static int __init imon_init(void)
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{
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int rc;
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printk(KERN_INFO MOD_NAME ": " MOD_DESC ", v" MOD_VERSION "\n");
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rc = usb_register(&imon_driver);
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if (rc) {
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err("%s: usb register failed(%d)", __func__, rc);
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return -ENODEV;
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}
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return 0;
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}
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static void __exit imon_exit(void)
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|
{
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usb_deregister(&imon_driver);
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printk(KERN_INFO MOD_NAME ": module removed. Goodbye!\n");
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}
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module_init(imon_init);
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|
module_exit(imon_exit);
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