q3k/linux
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
linux/drivers/media/IR/imon.c
Arnd Bergmann 6038f373a3 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(...)
|
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
|
   *off += E
|
   func(..., off, ...)
|
   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
|
  *off += E
|
  func(..., off, ...)
|
  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>
2010-10-15 15:53:27 +02:00

2388 lines
62 KiB
C
Raw Blame History

/*
* imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
*
* Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com>
* Portions based on the original lirc_imon driver,
* Copyright(C) 2004 Venky Raju(dev@venky.ws)
*
* Huge thanks to R. Geoff Newbury for invaluable debugging on the
* 0xffdc iMON devices, and for sending me one to hack on, without
* which the support for them wouldn't be nearly as good. Thanks
* also to the numerous 0xffdc device owners that tested auto-config
* support for me and provided debug dumps from their devices.
*
* imon is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <media/ir-core.h>
#include <linux/time.h>
#include <linux/timer.h>
#define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>"
#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
#define MOD_NAME "imon"
#define MOD_VERSION "0.9.1"
#define DISPLAY_MINOR_BASE 144
#define DEVICE_NAME "lcd%d"
#define BUF_CHUNK_SIZE 8
#define BUF_SIZE 128
#define BIT_DURATION 250 /* each bit received is 250us */
#define IMON_CLOCK_ENABLE_PACKETS 2
/*** P R O T O T Y P E S ***/
/* USB Callback prototypes */
static int imon_probe(struct usb_interface *interface,
const struct usb_device_id *id);
static void imon_disconnect(struct usb_interface *interface);
static void usb_rx_callback_intf0(struct urb *urb);
static void usb_rx_callback_intf1(struct urb *urb);
static void usb_tx_callback(struct urb *urb);
/* suspend/resume support */
static int imon_resume(struct usb_interface *intf);
static int imon_suspend(struct usb_interface *intf, pm_message_t message);
/* Display file_operations function prototypes */
static int display_open(struct inode *inode, struct file *file);
static int display_close(struct inode *inode, struct file *file);
/* VFD write operation */
static ssize_t vfd_write(struct file *file, const char *buf,
size_t n_bytes, loff_t *pos);
/* LCD file_operations override function prototypes */
static ssize_t lcd_write(struct file *file, const char *buf,
size_t n_bytes, loff_t *pos);
/*** G L O B A L S ***/
struct imon_context {
struct device *dev;
struct ir_dev_props *props;
/* Newer devices have two interfaces */
struct usb_device *usbdev_intf0;
struct usb_device *usbdev_intf1;
bool display_supported; /* not all controllers do */
bool display_isopen; /* display port has been opened */
bool rf_device; /* true if iMON 2.4G LT/DT RF device */
bool rf_isassociating; /* RF remote associating */
bool dev_present_intf0; /* USB device presence, interface 0 */
bool dev_present_intf1; /* USB device presence, interface 1 */
struct mutex lock; /* to lock this object */
wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
struct usb_endpoint_descriptor *rx_endpoint_intf0;
struct usb_endpoint_descriptor *rx_endpoint_intf1;
struct usb_endpoint_descriptor *tx_endpoint;
struct urb *rx_urb_intf0;
struct urb *rx_urb_intf1;
struct urb *tx_urb;
bool tx_control;
unsigned char usb_rx_buf[8];
unsigned char usb_tx_buf[8];
struct tx_t {
unsigned char data_buf[35]; /* user data buffer */
struct completion finished; /* wait for write to finish */
bool busy; /* write in progress */
int status; /* status of tx completion */
} tx;
u16 vendor; /* usb vendor ID */
u16 product; /* usb product ID */
struct input_dev *idev; /* input device for remote */
struct input_dev *touch; /* input device for touchscreen */
u32 kc; /* current input keycode */
u32 last_keycode; /* last reported input keycode */
u64 ir_type; /* iMON or MCE (RC6) IR protocol? */
u8 mce_toggle_bit; /* last mce toggle bit */
bool release_code; /* some keys send a release code */
u8 display_type; /* store the display type */
bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */
char name_idev[128]; /* input device name */
char phys_idev[64]; /* input device phys path */
struct timer_list itimer; /* input device timer, need for rc6 */
char name_touch[128]; /* touch screen name */
char phys_touch[64]; /* touch screen phys path */
struct timer_list ttimer; /* touch screen timer */
int touch_x; /* x coordinate on touchscreen */
int touch_y; /* y coordinate on touchscreen */
};
#define TOUCH_TIMEOUT (HZ/30)
/* vfd character device file operations */
static const struct file_operations vfd_fops = {
.owner = THIS_MODULE,
.open = &display_open,
.write = &vfd_write,
.release = &display_close,
.llseek = noop_llseek,
};
/* lcd character device file operations */
static const struct file_operations lcd_fops = {
.owner = THIS_MODULE,
.open = &display_open,
.write = &lcd_write,
.release = &display_close,
.llseek = noop_llseek,
};
enum {
IMON_DISPLAY_TYPE_AUTO = 0,
IMON_DISPLAY_TYPE_VFD = 1,
IMON_DISPLAY_TYPE_LCD = 2,
IMON_DISPLAY_TYPE_VGA = 3,
IMON_DISPLAY_TYPE_NONE = 4,
};
enum {
IMON_KEY_IMON = 0,
IMON_KEY_MCE = 1,
IMON_KEY_PANEL = 2,
};
/*
* USB Device ID for iMON USB Control Boards
*
* The Windows drivers contain 6 different inf files, more or less one for
* each new device until the 0x0034-0x0046 devices, which all use the same
* driver. Some of the devices in the 34-46 range haven't been definitively
* identified yet. Early devices have either a TriGem Computer, Inc. or a
* Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
* devices use the SoundGraph vendor ID (0x15c2). This driver only supports
* the ffdc and later devices, which do onboard decoding.
*/
static struct usb_device_id imon_usb_id_table[] = {
/*
* Several devices with this same device ID, all use iMON_PAD.inf
* SoundGraph iMON PAD (IR & VFD)
* SoundGraph iMON PAD (IR & LCD)
* SoundGraph iMON Knob (IR only)
*/
{ USB_DEVICE(0x15c2, 0xffdc) },
/*
* Newer devices, all driven by the latest iMON Windows driver, full
* list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2'
* Need user input to fill in details on unknown devices.
*/
/* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */
{ USB_DEVICE(0x15c2, 0x0034) },
/* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
{ USB_DEVICE(0x15c2, 0x0035) },
/* SoundGraph iMON OEM VFD (IR & VFD) */
{ USB_DEVICE(0x15c2, 0x0036) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0037) },
/* SoundGraph iMON OEM LCD (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0038) },
/* SoundGraph iMON UltraBay (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0039) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003a) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003b) },
/* SoundGraph iMON OEM Inside (IR only) */
{ USB_DEVICE(0x15c2, 0x003c) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003d) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003e) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003f) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0040) },
/* SoundGraph iMON MINI (IR only) */
{ USB_DEVICE(0x15c2, 0x0041) },
/* Antec Veris Multimedia Station EZ External (IR only) */
{ USB_DEVICE(0x15c2, 0x0042) },
/* Antec Veris Multimedia Station Basic Internal (IR only) */
{ USB_DEVICE(0x15c2, 0x0043) },
/* Antec Veris Multimedia Station Elite (IR & VFD) */
{ USB_DEVICE(0x15c2, 0x0044) },
/* Antec Veris Multimedia Station Premiere (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0045) },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0046) },
{}
};
/* USB Device data */
static struct usb_driver imon_driver = {
.name = MOD_NAME,
.probe = imon_probe,
.disconnect = imon_disconnect,
.suspend = imon_suspend,
.resume = imon_resume,
.id_table = imon_usb_id_table,
};
static struct usb_class_driver imon_vfd_class = {
.name = DEVICE_NAME,
.fops = &vfd_fops,
.minor_base = DISPLAY_MINOR_BASE,
};
static struct usb_class_driver imon_lcd_class = {
.name = DEVICE_NAME,
.fops = &lcd_fops,
.minor_base = DISPLAY_MINOR_BASE,
};
/* imon receiver front panel/knob key table */
static const struct {
u64 hw_code;
u32 keycode;
} imon_panel_key_table[] = {
{ 0x000000000f00ffeell, KEY_PROG1 }, /* Go */
{ 0x000000001f00ffeell, KEY_AUDIO },
{ 0x000000002000ffeell, KEY_VIDEO },
{ 0x000000002100ffeell, KEY_CAMERA },
{ 0x000000002700ffeell, KEY_DVD },
{ 0x000000002300ffeell, KEY_TV },
{ 0x000000000500ffeell, KEY_PREVIOUS },
{ 0x000000000700ffeell, KEY_REWIND },
{ 0x000000000400ffeell, KEY_STOP },
{ 0x000000003c00ffeell, KEY_PLAYPAUSE },
{ 0x000000000800ffeell, KEY_FASTFORWARD },
{ 0x000000000600ffeell, KEY_NEXT },
{ 0x000000010000ffeell, KEY_RIGHT },
{ 0x000001000000ffeell, KEY_LEFT },
{ 0x000000003d00ffeell, KEY_SELECT },
{ 0x000100000000ffeell, KEY_VOLUMEUP },
{ 0x010000000000ffeell, KEY_VOLUMEDOWN },
{ 0x000000000100ffeell, KEY_MUTE },
/* iMON Knob values */
{ 0x000100ffffffffeell, KEY_VOLUMEUP },
{ 0x010000ffffffffeell, KEY_VOLUMEDOWN },
{ 0x000008ffffffffeell, KEY_MUTE },
};
/* to prevent races between open() and disconnect(), probing, etc */
static DEFINE_MUTEX(driver_lock);
/* Module bookkeeping bits */
MODULE_AUTHOR(MOD_AUTHOR);
MODULE_DESCRIPTION(MOD_DESC);
MODULE_VERSION(MOD_VERSION);
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
static bool debug;
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */
static int display_type;
module_param(display_type, int, S_IRUGO);
MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, "
"1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)");
static int pad_stabilize = 1;
module_param(pad_stabilize, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD "
"presses in arrow key mode. 0=disable, 1=enable (default).");
/*
* In certain use cases, mouse mode isn't really helpful, and could actually
* cause confusion, so allow disabling it when the IR device is open.
*/
static bool nomouse;
module_param(nomouse, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is "
"open. 0=don't disable, 1=disable. (default: don't disable)");
/* threshold at which a pad push registers as an arrow key in kbd mode */
static int pad_thresh;
module_param(pad_thresh, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an "
"arrow key in kbd mode (default: 28)");
static void free_imon_context(struct imon_context *ictx)
{
struct device *dev = ictx->dev;
usb_free_urb(ictx->tx_urb);
usb_free_urb(ictx->rx_urb_intf0);
usb_free_urb(ictx->rx_urb_intf1);
kfree(ictx);
dev_dbg(dev, "%s: iMON context freed\n", __func__);
}
/**
* Called when the Display device (e.g. /dev/lcd0)
* is opened by the application.
*/
static int display_open(struct inode *inode, struct file *file)
{
struct usb_interface *interface;
struct imon_context *ictx = NULL;
int subminor;
int retval = 0;
/* prevent races with disconnect */
mutex_lock(&driver_lock);
subminor = iminor(inode);
interface = usb_find_interface(&imon_driver, subminor);
if (!interface) {
err("%s: could not find interface for minor %d",
__func__, subminor);
retval = -ENODEV;
goto exit;
}
ictx = usb_get_intfdata(interface);
if (!ictx) {
err("%s: no context found for minor %d", __func__, subminor);
retval = -ENODEV;
goto exit;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
err("%s: display not supported by device", __func__);
retval = -ENODEV;
} else if (ictx->display_isopen) {
err("%s: display port is already open", __func__);
retval = -EBUSY;
} else {
ictx->display_isopen = true;
file->private_data = ictx;
dev_dbg(ictx->dev, "display port opened\n");
}
mutex_unlock(&ictx->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 *ictx = NULL;
int retval = 0;
ictx = file->private_data;
if (!ictx) {
err("%s: no context for device", __func__);
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
err("%s: display not supported by device", __func__);
retval = -ENODEV;
} else if (!ictx->display_isopen) {
err("%s: display is not open", __func__);
retval = -EIO;
} else {
ictx->display_isopen = false;
dev_dbg(ictx->dev, "display port closed\n");
if (!ictx->dev_present_intf0) {
/*
* Device disconnected before close and IR port is not
* open. If IR port is open, context will be deleted by
* ir_close.
*/
mutex_unlock(&ictx->lock);
free_imon_context(ictx);
return retval;
}
}
mutex_unlock(&ictx->lock);
return retval;
}
/**
* Sends a packet to the device -- this function must be called
* with ictx->lock held.
*/
static int send_packet(struct imon_context *ictx)
{
unsigned int pipe;
unsigned long timeout;
int interval = 0;
int retval = 0;
struct usb_ctrlrequest *control_req = NULL;
/* Check if we need to use control or interrupt urb */
if (!ictx->tx_control) {
pipe = usb_sndintpipe(ictx->usbdev_intf0,
ictx->tx_endpoint->bEndpointAddress);
interval = ictx->tx_endpoint->bInterval;
usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe,
ictx->usb_tx_buf,
sizeof(ictx->usb_tx_buf),
usb_tx_callback, ictx, interval);
ictx->tx_urb->actual_length = 0;
} else {
/* fill request into kmalloc'ed space: */
control_req = kmalloc(sizeof(struct usb_ctrlrequest),
GFP_KERNEL);
if (control_req == NULL)
return -ENOMEM;
/* setup packet is '21 09 0200 0001 0008' */
control_req->bRequestType = 0x21;
control_req->bRequest = 0x09;
control_req->wValue = cpu_to_le16(0x0200);
control_req->wIndex = cpu_to_le16(0x0001);
control_req->wLength = cpu_to_le16(0x0008);
/* control pipe is endpoint 0x00 */
pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0);
/* build the control urb */
usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0,
pipe, (unsigned char *)control_req,
ictx->usb_tx_buf,
sizeof(ictx->usb_tx_buf),
usb_tx_callback, ictx);
ictx->tx_urb->actual_length = 0;
}
init_completion(&ictx->tx.finished);
ictx->tx.busy = true;
smp_rmb(); /* ensure later readers know we're busy */
retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL);
if (retval) {
ictx->tx.busy = false;
smp_rmb(); /* ensure later readers know we're not busy */
err("%s: error submitting urb(%d)", __func__, retval);
} else {
/* Wait for transmission to complete (or abort) */
mutex_unlock(&ictx->lock);
retval = wait_for_completion_interruptible(
&ictx->tx.finished);
if (retval)
err("%s: task interrupted", __func__);
mutex_lock(&ictx->lock);
retval = ictx->tx.status;
if (retval)
err("%s: packet tx failed (%d)", __func__, retval);
}
kfree(control_req);
/*
* Induce a mandatory 5ms delay before returning, as otherwise,
* send_packet can get called so rapidly as to overwhelm the device,
* particularly on faster systems and/or those with quirky usb.
*/
timeout = msecs_to_jiffies(5);
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(timeout);
return retval;
}
/**
* Sends an associate packet to the iMON 2.4G.
*
* This might not be such a good idea, since it has an id collision with
* some versions of the "IR & VFD" combo. The only way to determine if it
* is an RF version is to look at the product description string. (Which
* we currently do not fetch).
*/
static int send_associate_24g(struct imon_context *ictx)
{
int retval;
const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x20 };
if (!ictx) {
err("%s: no context for device", __func__);
return -ENODEV;
}
if (!ictx->dev_present_intf0) {
err("%s: no iMON device present", __func__);
return -ENODEV;
}
memcpy(ictx->usb_tx_buf, packet, sizeof(packet));
retval = send_packet(ictx);
return retval;
}
/**
* Sends packets to setup and show clock on iMON display
*
* Arguments: year - last 2 digits of year, month - 1..12,
* day - 1..31, dow - day of the week (0-Sun...6-Sat),
* hour - 0..23, minute - 0..59, second - 0..59
*/
static int send_set_imon_clock(struct imon_context *ictx,
unsigned int year, unsigned int month,
unsigned int day, unsigned int dow,
unsigned int hour, unsigned int minute,
unsigned int second)
{
unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8];
int retval = 0;
int i;
if (!ictx) {
err("%s: no context for device", __func__);
return -ENODEV;
}
switch (ictx->display_type) {
case IMON_DISPLAY_TYPE_LCD:
clock_enable_pkt[0][0] = 0x80;
clock_enable_pkt[0][1] = year;
clock_enable_pkt[0][2] = month-1;
clock_enable_pkt[0][3] = day;
clock_enable_pkt[0][4] = hour;
clock_enable_pkt[0][5] = minute;
clock_enable_pkt[0][6] = second;
clock_enable_pkt[1][0] = 0x80;
clock_enable_pkt[1][1] = 0;
clock_enable_pkt[1][2] = 0;
clock_enable_pkt[1][3] = 0;
clock_enable_pkt[1][4] = 0;
clock_enable_pkt[1][5] = 0;
clock_enable_pkt[1][6] = 0;
if (ictx->product == 0xffdc) {
clock_enable_pkt[0][7] = 0x50;
clock_enable_pkt[1][7] = 0x51;
} else {
clock_enable_pkt[0][7] = 0x88;
clock_enable_pkt[1][7] = 0x8a;
}
break;
case IMON_DISPLAY_TYPE_VFD:
clock_enable_pkt[0][0] = year;
clock_enable_pkt[0][1] = month-1;
clock_enable_pkt[0][2] = day;
clock_enable_pkt[0][3] = dow;
clock_enable_pkt[0][4] = hour;
clock_enable_pkt[0][5] = minute;
clock_enable_pkt[0][6] = second;
clock_enable_pkt[0][7] = 0x40;
clock_enable_pkt[1][0] = 0;
clock_enable_pkt[1][1] = 0;
clock_enable_pkt[1][2] = 1;
clock_enable_pkt[1][3] = 0;
clock_enable_pkt[1][4] = 0;
clock_enable_pkt[1][5] = 0;
clock_enable_pkt[1][6] = 0;
clock_enable_pkt[1][7] = 0x42;
break;
default:
return -ENODEV;
}
for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) {
memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8);
retval = send_packet(ictx);
if (retval) {
err("%s: send_packet failed for packet %d",
__func__, i);
break;
}
}
return retval;
}
/**
* These are the sysfs functions to handle the association on the iMON 2.4G LT.
*/
static ssize_t show_associate_remote(struct device *d,
struct device_attribute *attr,
char *buf)
{
struct imon_context *ictx = dev_get_drvdata(d);
if (!ictx)
return -ENODEV;
mutex_lock(&ictx->lock);
if (ictx->rf_isassociating)
strcpy(buf, "associating\n");
else
strcpy(buf, "closed\n");
dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for "
"instructions on how to associate your iMON 2.4G DT/LT "
"remote\n");
mutex_unlock(&ictx->lock);
return strlen(buf);
}
static ssize_t store_associate_remote(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct imon_context *ictx;
ictx = dev_get_drvdata(d);
if (!ictx)
return -ENODEV;
mutex_lock(&ictx->lock);
ictx->rf_isassociating = true;
send_associate_24g(ictx);
mutex_unlock(&ictx->lock);
return count;
}
/**
* sysfs functions to control internal imon clock
*/
static ssize_t show_imon_clock(struct device *d,
struct device_attribute *attr, char *buf)
{
struct imon_context *ictx = dev_get_drvdata(d);
size_t len;
if (!ictx)
return -ENODEV;
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
len = snprintf(buf, PAGE_SIZE, "Not supported.");
} else {
len = snprintf(buf, PAGE_SIZE,
"To set the clock on your iMON display:\n"
"# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n"
"%s", ictx->display_isopen ?
"\nNOTE: imon device must be closed\n" : "");
}
mutex_unlock(&ictx->lock);
return len;
}
static ssize_t store_imon_clock(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct imon_context *ictx = dev_get_drvdata(d);
ssize_t retval;
unsigned int year, month, day, dow, hour, minute, second;
if (!ictx)
return -ENODEV;
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
retval = -ENODEV;
goto exit;
} else if (ictx->display_isopen) {
retval = -EBUSY;
goto exit;
}
if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow,
&hour, &minute, &second) != 7) {
retval = -EINVAL;
goto exit;
}
if ((month < 1 || month > 12) ||
(day < 1 || day > 31) || (dow > 6) ||
(hour > 23) || (minute > 59) || (second > 59)) {
retval = -EINVAL;
goto exit;
}
retval = send_set_imon_clock(ictx, year, month, day, dow,
hour, minute, second);
if (retval)
goto exit;
retval = count;
exit:
mutex_unlock(&ictx->lock);
return retval;
}
static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock,
store_imon_clock);
static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote,
store_associate_remote);
static struct attribute *imon_display_sysfs_entries[] = {
&dev_attr_imon_clock.attr,
NULL
};
static struct attribute_group imon_display_attribute_group = {
.attrs = imon_display_sysfs_entries
};
static struct attribute *imon_rf_sysfs_entries[] = {
&dev_attr_associate_remote.attr,
NULL
};
static struct attribute_group imon_rf_attribute_group = {
.attrs = imon_rf_sysfs_entries
};
/**
* 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 *ictx;
const unsigned char vfd_packet6[] = {
0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
ictx = file->private_data;
if (!ictx) {
err("%s: no context for device", __func__);
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->dev_present_intf0) {
err("%s: no iMON device present", __func__);
retval = -ENODEV;
goto exit;
}
if (n_bytes <= 0 || n_bytes > 32) {
err("%s: invalid payload size", __func__);
retval = -EINVAL;
goto exit;
}
if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) {
retval = -EFAULT;
goto exit;
}
/* Pad with spaces */
for (i = n_bytes; i < 32; ++i)
ictx->tx.data_buf[i] = ' ';
for (i = 32; i < 35; ++i)
ictx->tx.data_buf[i] = 0xFF;
offset = 0;
seq = 0;
do {
memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7);
ictx->usb_tx_buf[7] = (unsigned char) seq;
retval = send_packet(ictx);
if (retval) {
err("%s: send packet failed for packet #%d",
__func__, seq/2);
goto exit;
} else {
seq += 2;
offset += 7;
}
} while (offset < 35);
/* Send packet #6 */
memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
ictx->usb_tx_buf[7] = (unsigned char) seq;
retval = send_packet(ictx);
if (retval)
err("%s: send packet failed for packet #%d",
__func__, seq / 2);
exit:
mutex_unlock(&ictx->lock);
return (!retval) ? n_bytes : retval;
}
/**
* Writes data to the LCD. The iMON OEM LCD screen expects 8-byte
* packets. We accept data as 16 hexadecimal digits, followed by a
* newline (to make it easy to drive the device from a command-line
* -- even though the actual binary data is a bit complicated).
*
* The device itself is not a "traditional" text-mode display. It's
* actually a 16x96 pixel bitmap display. That means if you want to
* display text, you've got to have your own "font" and translate the
* text into bitmaps for display. This is really flexible (you can
* display whatever diacritics you need, and so on), but it's also
* a lot more complicated than most LCDs...
*/
static ssize_t lcd_write(struct file *file, const char *buf,
size_t n_bytes, loff_t *pos)
{
int retval = 0;
struct imon_context *ictx;
ictx = file->private_data;
if (!ictx) {
err("%s: no context for device", __func__);
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
err("%s: no iMON display present", __func__);
retval = -ENODEV;
goto exit;
}
if (n_bytes != 8) {
err("%s: invalid payload size: %d (expecting 8)",
__func__, (int) n_bytes);
retval = -EINVAL;
goto exit;
}
if (copy_from_user(ictx->usb_tx_buf, buf, 8)) {
retval = -EFAULT;
goto exit;
}
retval = send_packet(ictx);
if (retval) {
err("%s: send packet failed!", __func__);
goto exit;
} else {
dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n",
__func__, (int) n_bytes);
}
exit:
mutex_unlock(&ictx->lock);
return (!retval) ? n_bytes : retval;
}
/**
* Callback function for USB core API: transmit data
*/
static void usb_tx_callback(struct urb *urb)
{
struct imon_context *ictx;
if (!urb)
return;
ictx = (struct imon_context *)urb->context;
if (!ictx)
return;
ictx->tx.status = urb->status;
/* notify waiters that write has finished */
ictx->tx.busy = false;
smp_rmb(); /* ensure later readers know we're not busy */
complete(&ictx->tx.finished);
}
/**
* mce/rc6 keypresses have no distinct release code, use timer
*/
static void imon_mce_timeout(unsigned long data)
{
struct imon_context *ictx = (struct imon_context *)data;
input_report_key(ictx->idev, ictx->last_keycode, 0);
input_sync(ictx->idev);
}
/**
* report touchscreen input
*/
static void imon_touch_display_timeout(unsigned long data)
{
struct imon_context *ictx = (struct imon_context *)data;
if (ictx->display_type != IMON_DISPLAY_TYPE_VGA)
return;
input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
input_report_key(ictx->touch, BTN_TOUCH, 0x00);
input_sync(ictx->touch);
}
/**
* iMON IR receivers support two different signal sets -- those used by
* the iMON remotes, and those used by the Windows MCE remotes (which is
* really just RC-6), but only one or the other at a time, as the signals
* are decoded onboard the receiver.
*/
int imon_ir_change_protocol(void *priv, u64 ir_type)
{
int retval;
struct imon_context *ictx = priv;
struct device *dev = ictx->dev;
bool pad_mouse;
unsigned char ir_proto_packet[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
if (ir_type && !(ir_type & ictx->props->allowed_protos))
dev_warn(dev, "Looks like you're trying to use an IR protocol "
"this device does not support\n");
switch (ir_type) {
case IR_TYPE_RC6:
dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
ir_proto_packet[0] = 0x01;
pad_mouse = false;
init_timer(&ictx->itimer);
ictx->itimer.data = (unsigned long)ictx;
ictx->itimer.function = imon_mce_timeout;
break;
case IR_TYPE_UNKNOWN:
case IR_TYPE_OTHER:
dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
if (pad_stabilize)
pad_mouse = true;
else {
dev_dbg(dev, "PAD stabilize functionality disabled\n");
pad_mouse = false;
}
/* ir_proto_packet[0] = 0x00; // already the default */
ir_type = IR_TYPE_OTHER;
break;
default:
dev_warn(dev, "Unsupported IR protocol specified, overriding "
"to iMON IR protocol\n");
if (pad_stabilize)
pad_mouse = true;
else {
dev_dbg(dev, "PAD stabilize functionality disabled\n");
pad_mouse = false;
}
/* ir_proto_packet[0] = 0x00; // already the default */
ir_type = IR_TYPE_OTHER;
break;
}
memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
retval = send_packet(ictx);
if (retval)
goto out;
ictx->ir_type = ir_type;
ictx->pad_mouse = pad_mouse;
out:
return retval;
}
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;
}
/**
* The directional pad behaves a bit differently, depending on whether this is
* one of the older ffdc devices or a newer device. Newer devices appear to
* have a higher resolution matrix for more precise mouse movement, but it
* makes things overly sensitive in keyboard mode, so we do some interesting
* contortions to make it less touchy. Older devices run through the same
* routine with shorter timeout and a smaller threshold.
*/
static int stabilize(int a, int b, u16 timeout, u16 threshold)
{
struct timeval ct;
static struct timeval prev_time = {0, 0};
static struct timeval hit_time = {0, 0};
static int x, y, prev_result, hits;
int result = 0;
int msec, msec_hit;
do_gettimeofday(&ct);
msec = tv2int(&ct, &prev_time);
msec_hit = tv2int(&ct, &hit_time);
if (msec > 100) {
x = 0;
y = 0;
hits = 0;
}
x += a;
y += b;
prev_time = ct;
if (abs(x) > threshold || abs(y) > threshold) {
if (abs(y) > abs(x))
result = (y > 0) ? 0x7F : 0x80;
else
result = (x > 0) ? 0x7F00 : 0x8000;
x = 0;
y = 0;
if (result == prev_result) {
hits++;
if (hits > 3) {
switch (result) {
case 0x7F:
y = 17 * threshold / 30;
break;
case 0x80:
y -= 17 * threshold / 30;
break;
case 0x7F00:
x = 17 * threshold / 30;
break;
case 0x8000:
x -= 17 * threshold / 30;
break;
}
}
if (hits == 2 && msec_hit < timeout) {
result = 0;
hits = 1;
}
} else {
prev_result = result;
hits = 1;
hit_time = ct;
}
}
return result;
}
static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 hw_code)
{
u32 scancode = be32_to_cpu(hw_code);
u32 keycode;
u32 release;
bool is_release_code = false;
/* Look for the initial press of a button */
keycode = ir_g_keycode_from_table(ictx->idev, scancode);
/* Look for the release of a button */
if (keycode == KEY_RESERVED) {
release = scancode & ~0x4000;
keycode = ir_g_keycode_from_table(ictx->idev, release);
if (keycode != KEY_RESERVED)
is_release_code = true;
}
ictx->release_code = is_release_code;
return keycode;
}
static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 hw_code)
{
u32 scancode = be32_to_cpu(hw_code);
u32 keycode;
#define MCE_KEY_MASK 0x7000
#define MCE_TOGGLE_BIT 0x8000
/*
* On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx
* (the toggle bit flipping between alternating key presses), while
* on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep
* the table trim, we always or in the bits to look up 0x8000ff4xx,
* but we can't or them into all codes, as some keys are decoded in
* a different way w/o the same use of the toggle bit...
*/
if ((scancode >> 24) & 0x80)
scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
keycode = ir_g_keycode_from_table(ictx->idev, scancode);
return keycode;
}
static u32 imon_panel_key_lookup(u64 hw_code)
{
int i;
u64 code = be64_to_cpu(hw_code);
u32 keycode = KEY_RESERVED;
for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
if (imon_panel_key_table[i].hw_code == (code | 0xffee)) {
keycode = imon_panel_key_table[i].keycode;
break;
}
}
return keycode;
}
static bool imon_mouse_event(struct imon_context *ictx,
unsigned char *buf, int len)
{
char rel_x = 0x00, rel_y = 0x00;
u8 right_shift = 1;
bool mouse_input = true;
int dir = 0;
/* newer iMON device PAD or mouse button */
if (ictx->product != 0xffdc && (buf[0] & 0x01) && len == 5) {
rel_x = buf[2];
rel_y = buf[3];
right_shift = 1;
/* 0xffdc iMON PAD or mouse button input */
} else if (ictx->product == 0xffdc && (buf[0] & 0x40) &&
!((buf[1] & 0x01) || ((buf[1] >> 2) & 0x01))) {
rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
(buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
if (buf[0] & 0x02)
rel_x |= ~0x0f;
rel_x = rel_x + rel_x / 2;
rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
(buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
if (buf[0] & 0x01)
rel_y |= ~0x0f;
rel_y = rel_y + rel_y / 2;
right_shift = 2;
/* some ffdc devices decode mouse buttons differently... */
} else if (ictx->product == 0xffdc && (buf[0] == 0x68)) {
right_shift = 2;
/* ch+/- buttons, which we use for an emulated scroll wheel */
} else if (ictx->kc == KEY_CHANNELUP && (buf[2] & 0x40) != 0x40) {
dir = 1;
} else if (ictx->kc == KEY_CHANNELDOWN && (buf[2] & 0x40) != 0x40) {
dir = -1;
} else
mouse_input = false;
if (mouse_input) {
dev_dbg(ictx->dev, "sending mouse data via input subsystem\n");
if (dir) {
input_report_rel(ictx->idev, REL_WHEEL, dir);
} else if (rel_x || rel_y) {
input_report_rel(ictx->idev, REL_X, rel_x);
input_report_rel(ictx->idev, REL_Y, rel_y);
} else {
input_report_key(ictx->idev, BTN_LEFT, buf[1] & 0x1);
input_report_key(ictx->idev, BTN_RIGHT,
buf[1] >> right_shift & 0x1);
}
input_sync(ictx->idev);
ictx->last_keycode = ictx->kc;
}
return mouse_input;
}
static void imon_touch_event(struct imon_context *ictx, unsigned char *buf)
{
mod_timer(&ictx->ttimer, jiffies + TOUCH_TIMEOUT);
ictx->touch_x = (buf[0] << 4) | (buf[1] >> 4);
ictx->touch_y = 0xfff - ((buf[2] << 4) | (buf[1] & 0xf));
input_report_abs(ictx->touch, ABS_X, ictx->touch_x);
input_report_abs(ictx->touch, ABS_Y, ictx->touch_y);
input_report_key(ictx->touch, BTN_TOUCH, 0x01);
input_sync(ictx->touch);
}
static void imon_pad_to_keys(struct imon_context *ictx, unsigned char *buf)
{
int dir = 0;
char rel_x = 0x00, rel_y = 0x00;
u16 timeout, threshold;
u64 temp_key;
u32 remote_key;
/*
* The imon directional pad functions more like a touchpad. Bytes 3 & 4
* contain a position coordinate (x,y), with each component ranging
* from -14 to 14. We want to down-sample this to only 4 discrete values
* for up/down/left/right arrow keys. Also, when you get too close to
* diagonals, it has a tendancy to jump back and forth, so lets try to
* ignore when they get too close.
*/
if (ictx->product != 0xffdc) {
/* first, pad to 8 bytes so it conforms with everything else */
buf[5] = buf[6] = buf[7] = 0;
timeout = 500; /* in msecs */
/* (2*threshold) x (2*threshold) square */
threshold = pad_thresh ? pad_thresh : 28;
rel_x = buf[2];
rel_y = buf[3];
if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
dir = stabilize((int)rel_x, (int)rel_y,
timeout, threshold);
if (!dir) {
ictx->kc = KEY_UNKNOWN;
return;
}
buf[2] = dir & 0xFF;
buf[3] = (dir >> 8) & 0xFF;
memcpy(&temp_key, buf, sizeof(temp_key));
remote_key = (u32) (le64_to_cpu(temp_key)
& 0xffffffff);
ictx->kc = imon_remote_key_lookup(ictx,
remote_key);
}
} else {
if (abs(rel_y) > abs(rel_x)) {
buf[2] = (rel_y > 0) ? 0x7F : 0x80;
buf[3] = 0;
ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
} else {
buf[2] = 0;
buf[3] = (rel_x > 0) ? 0x7F : 0x80;
ictx->kc = (rel_x > 0) ? KEY_RIGHT : KEY_LEFT;
}
}
/*
* Handle on-board decoded pad events for e.g. older VFD/iMON-Pad
* device (15c2:ffdc). The remote generates various codes from
* 0x68nnnnB7 to 0x6AnnnnB7, the left mouse button generates
* 0x688301b7 and the right one 0x688481b7. All other keys generate
* 0x2nnnnnnn. Position coordinate is encoded in buf[1] and buf[2] with
* reversed endianess. Extract direction from buffer, rotate endianess,
* adjust sign and feed the values into stabilize(). The resulting codes
* will be 0x01008000, 0x01007F00, which match the newer devices.
*/
} else {
timeout = 10; /* in msecs */
/* (2*threshold) x (2*threshold) square */
threshold = pad_thresh ? pad_thresh : 15;
/* buf[1] is x */
rel_x = (buf[1] & 0x08) | (buf[1] & 0x10) >> 2 |
(buf[1] & 0x20) >> 4 | (buf[1] & 0x40) >> 6;
if (buf[0] & 0x02)
rel_x |= ~0x10+1;
/* buf[2] is y */
rel_y = (buf[2] & 0x08) | (buf[2] & 0x10) >> 2 |
(buf[2] & 0x20) >> 4 | (buf[2] & 0x40) >> 6;
if (buf[0] & 0x01)
rel_y |= ~0x10+1;
buf[0] = 0x01;
buf[1] = buf[4] = buf[5] = buf[6] = buf[7] = 0;
if (ictx->ir_type == IR_TYPE_OTHER && pad_stabilize) {
dir = stabilize((int)rel_x, (int)rel_y,
timeout, threshold);
if (!dir) {
ictx->kc = KEY_UNKNOWN;
return;
}
buf[2] = dir & 0xFF;
buf[3] = (dir >> 8) & 0xFF;
memcpy(&temp_key, buf, sizeof(temp_key));
remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
ictx->kc = imon_remote_key_lookup(ictx, remote_key);
} else {
if (abs(rel_y) > abs(rel_x)) {
buf[2] = (rel_y > 0) ? 0x7F : 0x80;
buf[3] = 0;
ictx->kc = (rel_y > 0) ? KEY_DOWN : KEY_UP;
} else {
buf[2] = 0;
buf[3] = (rel_x > 0) ? 0x7F : 0x80;
ictx->kc = (rel_x > 0) ? KEY_RIGHT : KEY_LEFT;
}
}
}
}
static int imon_parse_press_type(struct imon_context *ictx,
unsigned char *buf, u8 ktype)
{
int press_type = 0;
int rep_delay = ictx->idev->rep[REP_DELAY];
int rep_period = ictx->idev->rep[REP_PERIOD];
/* key release of 0x02XXXXXX key */
if (ictx->kc == KEY_RESERVED && buf[0] == 0x02 && buf[3] == 0x00)
ictx->kc = ictx->last_keycode;
/* mouse button release on (some) 0xffdc devices */
else if (ictx->kc == KEY_RESERVED && buf[0] == 0x68 && buf[1] == 0x82 &&
buf[2] == 0x81 && buf[3] == 0xb7)
ictx->kc = ictx->last_keycode;
/* mouse button release on (some other) 0xffdc devices */
else if (ictx->kc == KEY_RESERVED && buf[0] == 0x01 && buf[1] == 0x00 &&
buf[2] == 0x81 && buf[3] == 0xb7)
ictx->kc = ictx->last_keycode;
/* mce-specific button handling */
else if (ktype == IMON_KEY_MCE) {
/* initial press */
if (ictx->kc != ictx->last_keycode
|| buf[2] != ictx->mce_toggle_bit) {
ictx->last_keycode = ictx->kc;
ictx->mce_toggle_bit = buf[2];
press_type = 1;
mod_timer(&ictx->itimer,
jiffies + msecs_to_jiffies(rep_delay));
/* repeat */
} else {
press_type = 2;
mod_timer(&ictx->itimer,
jiffies + msecs_to_jiffies(rep_period));
}
/* incoherent or irrelevant data */
} else if (ictx->kc == KEY_RESERVED)
press_type = -EINVAL;
/* key release of 0xXXXXXXb7 key */
else if (ictx->release_code)
press_type = 0;
/* this is a button press */
else
press_type = 1;
return press_type;
}
/**
* Process the incoming packet
*/
static void imon_incoming_packet(struct imon_context *ictx,
struct urb *urb, int intf)
{
int len = urb->actual_length;
unsigned char *buf = urb->transfer_buffer;
struct device *dev = ictx->dev;
u32 kc;
bool norelease = false;
int i;
u64 temp_key;
u64 panel_key = 0;
u32 remote_key = 0;
struct input_dev *idev = NULL;
int press_type = 0;
int msec;
struct timeval t;
static struct timeval prev_time = { 0, 0 };
u8 ktype = IMON_KEY_IMON;
idev = ictx->idev;
/* filter out junk data on the older 0xffdc imon devices */
if ((buf[0] == 0xff) && (buf[1] == 0xff) && (buf[2] == 0xff))
return;
/* Figure out what key was pressed */
memcpy(&temp_key, buf, sizeof(temp_key));
if (len == 8 && buf[7] == 0xee) {
ktype = IMON_KEY_PANEL;
panel_key = le64_to_cpu(temp_key);
kc = imon_panel_key_lookup(panel_key);
} else {
remote_key = (u32) (le64_to_cpu(temp_key) & 0xffffffff);
if (ictx->ir_type == IR_TYPE_RC6) {
if (buf[0] == 0x80)
ktype = IMON_KEY_MCE;
kc = imon_mce_key_lookup(ictx, remote_key);
} else
kc = imon_remote_key_lookup(ictx, remote_key);
}
/* keyboard/mouse mode toggle button */
if (kc == KEY_KEYBOARD && !ictx->release_code) {
ictx->last_keycode = kc;
if (!nomouse) {
ictx->pad_mouse = ~(ictx->pad_mouse) & 0x1;
dev_dbg(dev, "toggling to %s mode\n",
ictx->pad_mouse ? "mouse" : "keyboard");
return;
} else {
ictx->pad_mouse = 0;
dev_dbg(dev, "mouse mode disabled, passing key value\n");
}
}
ictx->kc = kc;
/* send touchscreen events through input subsystem if touchpad data */
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA && len == 8 &&
buf[7] == 0x86) {
imon_touch_event(ictx, buf);
/* look for mouse events with pad in mouse mode */
} else if (ictx->pad_mouse) {
if (imon_mouse_event(ictx, buf, len))
return;
}
/* Now for some special handling to convert pad input to arrow keys */
if (((len == 5) && (buf[0] == 0x01) && (buf[4] == 0x00)) ||
((len == 8) && (buf[0] & 0x40) &&
!(buf[1] & 0x1 || buf[1] >> 2 & 0x1))) {
len = 8;
imon_pad_to_keys(ictx, buf);
norelease = true;
}
if (debug) {
printk(KERN_INFO "intf%d decoded packet: ", intf);
for (i = 0; i < len; ++i)
printk("%02x ", buf[i]);
printk("\n");
}
press_type = imon_parse_press_type(ictx, buf, ktype);
if (press_type < 0)
goto not_input_data;
if (ictx->kc == KEY_UNKNOWN)
goto unknown_key;
/* KEY_MUTE repeats from MCE and knob need to be suppressed */
if ((ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode)
&& (buf[7] == 0xee || ktype == IMON_KEY_MCE)) {
do_gettimeofday(&t);
msec = tv2int(&t, &prev_time);
prev_time = t;
if (msec < idev->rep[REP_DELAY])
return;
}
input_report_key(idev, ictx->kc, press_type);
input_sync(idev);
/* panel keys and some remote keys don't generate a release */
if (panel_key || norelease) {
input_report_key(idev, ictx->kc, 0);
input_sync(idev);
}
ictx->last_keycode = ictx->kc;
return;
unknown_key:
dev_info(dev, "%s: unknown keypress, code 0x%llx\n", __func__,
(panel_key ? be64_to_cpu(panel_key) :
be32_to_cpu(remote_key)));
return;
not_input_data:
if (len != 8) {
dev_warn(dev, "imon %s: invalid incoming packet "
"size (len = %d, intf%d)\n", __func__, len, intf);
return;
}
/* iMON 2.4G associate frame */
if (buf[0] == 0x00 &&
buf[2] == 0xFF && /* REFID */
buf[3] == 0xFF &&
buf[4] == 0xFF &&
buf[5] == 0xFF && /* iMON 2.4G */
((buf[6] == 0x4E && buf[7] == 0xDF) || /* LT */
(buf[6] == 0x5E && buf[7] == 0xDF))) { /* DT */
dev_warn(dev, "%s: remote associated refid=%02X\n",
__func__, buf[1]);
ictx->rf_isassociating = false;
}
}
/**
* Callback function for USB core API: receive data
*/
static void usb_rx_callback_intf0(struct urb *urb)
{
struct imon_context *ictx;
int intfnum = 0;
if (!urb)
return;
ictx = (struct imon_context *)urb->context;
if (!ictx)
return;
switch (urb->status) {
case -ENOENT: /* usbcore unlink successful! */
return;
case -ESHUTDOWN: /* transport endpoint was shut down */
break;
case 0:
imon_incoming_packet(ictx, urb, intfnum);
break;
default:
dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
__func__, urb->status);
break;
}
usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
}
static void usb_rx_callback_intf1(struct urb *urb)
{
struct imon_context *ictx;
int intfnum = 1;
if (!urb)
return;
ictx = (struct imon_context *)urb->context;
if (!ictx)
return;
switch (urb->status) {
case -ENOENT: /* usbcore unlink successful! */
return;
case -ESHUTDOWN: /* transport endpoint was shut down */
break;
case 0:
imon_incoming_packet(ictx, urb, intfnum);
break;
default:
dev_warn(ictx->dev, "imon %s: status(%d): ignored\n",
__func__, urb->status);
break;
}
usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
}
static struct input_dev *imon_init_idev(struct imon_context *ictx)
{
struct input_dev *idev;
struct ir_dev_props *props;
int ret, i;
idev = input_allocate_device();
if (!idev) {
dev_err(ictx->dev, "remote input dev allocation failed\n");
goto idev_alloc_failed;
}
props = kzalloc(sizeof(struct ir_dev_props), GFP_KERNEL);
if (!props) {
dev_err(ictx->dev, "remote ir dev props allocation failed\n");
goto props_alloc_failed;
}
snprintf(ictx->name_idev, sizeof(ictx->name_idev),
"iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
idev->name = ictx->name_idev;
usb_make_path(ictx->usbdev_intf0, ictx->phys_idev,
sizeof(ictx->phys_idev));
strlcat(ictx->phys_idev, "/input0", sizeof(ictx->phys_idev));
idev->phys = ictx->phys_idev;
idev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) | BIT_MASK(EV_REL);
idev->keybit[BIT_WORD(BTN_MOUSE)] =
BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
idev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y) |
BIT_MASK(REL_WHEEL);
/* panel and/or knob code support */
for (i = 0; i < ARRAY_SIZE(imon_panel_key_table); i++) {
u32 kc = imon_panel_key_table[i].keycode;
__set_bit(kc, idev->keybit);
}
props->priv = ictx;
props->driver_type = RC_DRIVER_SCANCODE;
/* IR_TYPE_OTHER maps to iMON PAD remote, IR_TYPE_RC6 to MCE remote */
props->allowed_protos = IR_TYPE_OTHER | IR_TYPE_RC6;
props->change_protocol = imon_ir_change_protocol;
ictx->props = props;
usb_to_input_id(ictx->usbdev_intf0, &idev->id);
idev->dev.parent = ictx->dev;
ret = ir_input_register(idev, RC_MAP_IMON_PAD, props, MOD_NAME);
if (ret < 0) {
dev_err(ictx->dev, "remote input dev register failed\n");
goto idev_register_failed;
}
return idev;
idev_register_failed:
kfree(props);
props_alloc_failed:
input_free_device(idev);
idev_alloc_failed:
return NULL;
}
static struct input_dev *imon_init_touch(struct imon_context *ictx)
{
struct input_dev *touch;
int ret;
touch = input_allocate_device();
if (!touch) {
dev_err(ictx->dev, "touchscreen input dev allocation failed\n");
goto touch_alloc_failed;
}
snprintf(ictx->name_touch, sizeof(ictx->name_touch),
"iMON USB Touchscreen (%04x:%04x)",
ictx->vendor, ictx->product);
touch->name = ictx->name_touch;
usb_make_path(ictx->usbdev_intf1, ictx->phys_touch,
sizeof(ictx->phys_touch));
strlcat(ictx->phys_touch, "/input1", sizeof(ictx->phys_touch));
touch->phys = ictx->phys_touch;
touch->evbit[0] =
BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
touch->keybit[BIT_WORD(BTN_TOUCH)] =
BIT_MASK(BTN_TOUCH);
input_set_abs_params(touch, ABS_X,
0x00, 0xfff, 0, 0);
input_set_abs_params(touch, ABS_Y,
0x00, 0xfff, 0, 0);
input_set_drvdata(touch, ictx);
usb_to_input_id(ictx->usbdev_intf1, &touch->id);
touch->dev.parent = ictx->dev;
ret = input_register_device(touch);
if (ret < 0) {
dev_info(ictx->dev, "touchscreen input dev register failed\n");
goto touch_register_failed;
}
return touch;
touch_register_failed:
input_free_device(ictx->touch);
touch_alloc_failed:
return NULL;
}
static bool imon_find_endpoints(struct imon_context *ictx,
struct usb_host_interface *iface_desc)
{
struct usb_endpoint_descriptor *ep;
struct usb_endpoint_descriptor *rx_endpoint = NULL;
struct usb_endpoint_descriptor *tx_endpoint = NULL;
int ifnum = iface_desc->desc.bInterfaceNumber;
int num_endpts = iface_desc->desc.bNumEndpoints;
int i, ep_dir, ep_type;
bool ir_ep_found = false;
bool display_ep_found = false;
bool tx_control = false;
/*
* 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) {
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 = true;
dev_dbg(ictx->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 = true;
dev_dbg(ictx->dev, "%s: found display endpoint\n", __func__);
}
}
if (ifnum == 0) {
ictx->rx_endpoint_intf0 = rx_endpoint;
/*
* tx is used to send characters to lcd/vfd, associate RF
* remotes, set IR protocol, and maybe more...
*/
ictx->tx_endpoint = tx_endpoint;
} else {
ictx->rx_endpoint_intf1 = rx_endpoint;
}
/*
* If we didn't find a display endpoint, this is probably one of the
* newer iMON devices that use control urb instead of interrupt
*/
if (!display_ep_found) {
tx_control = true;
display_ep_found = true;
dev_dbg(ictx->dev, "%s: device uses control endpoint, not "
"interface OUT endpoint\n", __func__);
}
/*
* Some iMON receivers have no display. Unfortunately, it seems
* that SoundGraph recycles device IDs between devices both with
* and without... :\
*/
if (ictx->display_type == IMON_DISPLAY_TYPE_NONE) {
display_ep_found = false;
dev_dbg(ictx->dev, "%s: device has no display\n", __func__);
}
/*
* iMON Touch devices have a VGA touchscreen, but no "display", as
* that refers to e.g. /dev/lcd0 (a character device LCD or VFD).
*/
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
display_ep_found = false;
dev_dbg(ictx->dev, "%s: iMON Touch device found\n", __func__);
}
/* Input endpoint is mandatory */
if (!ir_ep_found)
err("%s: no valid input (IR) endpoint found.", __func__);
ictx->tx_control = tx_control;
if (display_ep_found)
ictx->display_supported = true;
return ir_ep_found;
}
static struct imon_context *imon_init_intf0(struct usb_interface *intf)
{
struct imon_context *ictx;
struct urb *rx_urb;
struct urb *tx_urb;
struct device *dev = &intf->dev;
struct usb_host_interface *iface_desc;
int ret = -ENOMEM;
ictx = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
if (!ictx) {
dev_err(dev, "%s: kzalloc failed for context", __func__);
goto exit;
}
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!rx_urb) {
dev_err(dev, "%s: usb_alloc_urb failed for IR urb", __func__);
goto rx_urb_alloc_failed;
}
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!tx_urb) {
dev_err(dev, "%s: usb_alloc_urb failed for display urb",
__func__);
goto tx_urb_alloc_failed;
}
mutex_init(&ictx->lock);
mutex_lock(&ictx->lock);
ictx->dev = dev;
ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
ictx->dev_present_intf0 = true;
ictx->rx_urb_intf0 = rx_urb;
ictx->tx_urb = tx_urb;
ictx->rf_device = false;
ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
ret = -ENODEV;
iface_desc = intf->cur_altsetting;
if (!imon_find_endpoints(ictx, iface_desc)) {
goto find_endpoint_failed;
}
ictx->idev = imon_init_idev(ictx);
if (!ictx->idev) {
dev_err(dev, "%s: input device setup failed\n", __func__);
goto idev_setup_failed;
}
usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
usb_rcvintpipe(ictx->usbdev_intf0,
ictx->rx_endpoint_intf0->bEndpointAddress),
ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
usb_rx_callback_intf0, ictx,
ictx->rx_endpoint_intf0->bInterval);
ret = usb_submit_urb(ictx->rx_urb_intf0, GFP_KERNEL);
if (ret) {
err("%s: usb_submit_urb failed for intf0 (%d)",
__func__, ret);
goto urb_submit_failed;
}
return ictx;
urb_submit_failed:
ir_input_unregister(ictx->idev);
idev_setup_failed:
find_endpoint_failed:
mutex_unlock(&ictx->lock);
usb_free_urb(tx_urb);
tx_urb_alloc_failed:
usb_free_urb(rx_urb);
rx_urb_alloc_failed:
kfree(ictx);
exit:
dev_err(dev, "unable to initialize intf0, err %d\n", ret);
return NULL;
}
static struct imon_context *imon_init_intf1(struct usb_interface *intf,
struct imon_context *ictx)
{
struct urb *rx_urb;
struct usb_host_interface *iface_desc;
int ret = -ENOMEM;
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!rx_urb) {
err("%s: usb_alloc_urb failed for IR urb", __func__);
goto rx_urb_alloc_failed;
}
mutex_lock(&ictx->lock);
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
init_timer(&ictx->ttimer);
ictx->ttimer.data = (unsigned long)ictx;
ictx->ttimer.function = imon_touch_display_timeout;
}
ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
ictx->dev_present_intf1 = true;
ictx->rx_urb_intf1 = rx_urb;
ret = -ENODEV;
iface_desc = intf->cur_altsetting;
if (!imon_find_endpoints(ictx, iface_desc))
goto find_endpoint_failed;
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
ictx->touch = imon_init_touch(ictx);
if (!ictx->touch)
goto touch_setup_failed;
} else
ictx->touch = NULL;
usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
usb_rcvintpipe(ictx->usbdev_intf1,
ictx->rx_endpoint_intf1->bEndpointAddress),
ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
usb_rx_callback_intf1, ictx,
ictx->rx_endpoint_intf1->bInterval);
ret = usb_submit_urb(ictx->rx_urb_intf1, GFP_KERNEL);
if (ret) {
err("%s: usb_submit_urb failed for intf1 (%d)",
__func__, ret);
goto urb_submit_failed;
}
return ictx;
urb_submit_failed:
if (ictx->touch)
input_unregister_device(ictx->touch);
touch_setup_failed:
find_endpoint_failed:
mutex_unlock(&ictx->lock);
usb_free_urb(rx_urb);
rx_urb_alloc_failed:
dev_err(ictx->dev, "unable to initialize intf0, err %d\n", ret);
return NULL;
}
/*
* The 0x15c2:0xffdc device ID was used for umpteen different imon
* devices, and all of them constantly spew interrupts, even when there
* is no actual data to report. However, byte 6 of this buffer looks like
* its unique across device variants, so we're trying to key off that to
* figure out which display type (if any) and what IR protocol the device
* actually supports. These devices have their IR protocol hard-coded into
* their firmware, they can't be changed on the fly like the newer hardware.
*/
static void imon_get_ffdc_type(struct imon_context *ictx)
{
u8 ffdc_cfg_byte = ictx->usb_rx_buf[6];
u8 detected_display_type = IMON_DISPLAY_TYPE_NONE;
u64 allowed_protos = IR_TYPE_OTHER;
switch (ffdc_cfg_byte) {
/* iMON Knob, no display, iMON IR + vol knob */
case 0x21:
dev_info(ictx->dev, "0xffdc iMON Knob, iMON IR");
ictx->display_supported = false;
break;
/* iMON 2.4G LT (usb stick), no display, iMON RF */
case 0x4e:
dev_info(ictx->dev, "0xffdc iMON 2.4G LT, iMON RF");
ictx->display_supported = false;
ictx->rf_device = true;
break;
/* iMON VFD, no IR (does have vol knob tho) */
case 0x35:
dev_info(ictx->dev, "0xffdc iMON VFD + knob, no IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
break;
/* iMON VFD, iMON IR */
case 0x24:
case 0x85:
dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
break;
/* iMON LCD, MCE IR */
case 0x9e:
case 0x9f:
dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
detected_display_type = IMON_DISPLAY_TYPE_LCD;
allowed_protos = IR_TYPE_RC6;
break;
default:
dev_info(ictx->dev, "Unknown 0xffdc device, "
"defaulting to VFD and iMON IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
break;
}
printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
ictx->display_type = detected_display_type;
ictx->props->allowed_protos = allowed_protos;
ictx->ir_type = allowed_protos;
}
static void imon_set_display_type(struct imon_context *ictx,
struct usb_interface *intf)
{
u8 configured_display_type = IMON_DISPLAY_TYPE_VFD;
/*
* 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 (display_type == IMON_DISPLAY_TYPE_AUTO) {
switch (ictx->product) {
case 0xffdc:
/* set in imon_get_ffdc_type() */
configured_display_type = ictx->display_type;
break;
case 0x0034:
case 0x0035:
configured_display_type = IMON_DISPLAY_TYPE_VGA;
break;
case 0x0038:
case 0x0039:
case 0x0045:
configured_display_type = IMON_DISPLAY_TYPE_LCD;
break;
case 0x003c:
case 0x0041:
case 0x0042:
case 0x0043:
configured_display_type = IMON_DISPLAY_TYPE_NONE;
ictx->display_supported = false;
break;
case 0x0036:
case 0x0044:
default:
configured_display_type = IMON_DISPLAY_TYPE_VFD;
break;
}
} else {
configured_display_type = display_type;
if (display_type == IMON_DISPLAY_TYPE_NONE)
ictx->display_supported = false;
else
ictx->display_supported = true;
dev_info(ictx->dev, "%s: overriding display type to %d via "
"modparam\n", __func__, display_type);
}
ictx->display_type = configured_display_type;
}
static void imon_init_display(struct imon_context *ictx,
struct usb_interface *intf)
{
int ret;
dev_dbg(ictx->dev, "Registering iMON display with sysfs\n");
/* set up sysfs entry for built-in clock */
ret = sysfs_create_group(&intf->dev.kobj,
&imon_display_attribute_group);
if (ret)
dev_err(ictx->dev, "Could not create display sysfs "
"entries(%d)", ret);
if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
ret = usb_register_dev(intf, &imon_lcd_class);
else
ret = usb_register_dev(intf, &imon_vfd_class);
if (ret)
/* Not a fatal error, so ignore */
dev_info(ictx->dev, "could not get a minor number for "
"display\n");
}
/**
* Callback function for USB core API: Probe
*/
static int __devinit 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_interface *first_if;
struct device *dev = &interface->dev;
int ifnum, code_length, sysfs_err;
int ret = 0;
struct imon_context *ictx = NULL;
struct imon_context *first_if_ctx = NULL;
u16 vendor, product;
const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x88 };
code_length = BUF_CHUNK_SIZE * 8;
usbdev = usb_get_dev(interface_to_usbdev(interface));
iface_desc = interface->cur_altsetting;
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);
first_if = usb_ifnum_to_if(usbdev, 0);
first_if_ctx = (struct imon_context *)usb_get_intfdata(first_if);
if (ifnum == 0) {
ictx = imon_init_intf0(interface);
if (!ictx) {
err("%s: failed to initialize context!\n", __func__);
ret = -ENODEV;
goto fail;
}
} else {
/* this is the secondary interface on the device */
ictx = imon_init_intf1(interface, first_if_ctx);
if (!ictx) {
err("%s: failed to attach to context!\n", __func__);
ret = -ENODEV;
goto fail;
}
}
usb_set_intfdata(interface, ictx);
if (ifnum == 0) {
/* Enable front-panel buttons and/or knobs */
memcpy(ictx->usb_tx_buf, &fp_packet, sizeof(fp_packet));
ret = send_packet(ictx);
/* Not fatal, but warn about it */
if (ret)
dev_info(dev, "failed to enable panel buttons "
"and/or knobs\n");
if (product == 0xffdc)
imon_get_ffdc_type(ictx);
imon_set_display_type(ictx, interface);
if (product == 0xffdc && ictx->rf_device) {
sysfs_err = sysfs_create_group(&interface->dev.kobj,
&imon_rf_attribute_group);
if (sysfs_err)
err("%s: Could not create RF sysfs entries(%d)",
__func__, sysfs_err);
}
if (ictx->display_supported)
imon_init_display(ictx, interface);
}
/* set IR protocol/remote type */
ret = imon_ir_change_protocol(ictx, ictx->ir_type);
if (ret) {
dev_warn(dev, "%s: failed to set IR protocol, falling back "
"to standard iMON protocol mode\n", __func__);
ictx->ir_type = IR_TYPE_OTHER;
}
dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
"usb<%d:%d> initialized\n", vendor, product, ifnum,
usbdev->bus->busnum, usbdev->devnum);
mutex_unlock(&ictx->lock);
mutex_unlock(&driver_lock);
return 0;
fail:
mutex_unlock(&driver_lock);
dev_err(dev, "unable to register, err %d\n", ret);
return ret;
}
/**
* Callback function for USB core API: disconnect
*/
static void __devexit imon_disconnect(struct usb_interface *interface)
{
struct imon_context *ictx;
struct device *dev;
int ifnum;
/* prevent races with multi-interface device probing and display_open */
mutex_lock(&driver_lock);
ictx = usb_get_intfdata(interface);
dev = ictx->dev;
ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
mutex_lock(&ictx->lock);
/*
* sysfs_remove_group is safe to call even if sysfs_create_group
* hasn't been called
*/
sysfs_remove_group(&interface->dev.kobj,
&imon_display_attribute_group);
sysfs_remove_group(&interface->dev.kobj,
&imon_rf_attribute_group);
usb_set_intfdata(interface, NULL);
/* Abort ongoing write */
if (ictx->tx.busy) {
usb_kill_urb(ictx->tx_urb);
complete_all(&ictx->tx.finished);
}
if (ifnum == 0) {
ictx->dev_present_intf0 = false;
usb_kill_urb(ictx->rx_urb_intf0);
ir_input_unregister(ictx->idev);
if (ictx->display_supported) {
if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
usb_deregister_dev(interface, &imon_lcd_class);
else
usb_deregister_dev(interface, &imon_vfd_class);
}
} else {
ictx->dev_present_intf1 = false;
usb_kill_urb(ictx->rx_urb_intf1);
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
input_unregister_device(ictx->touch);
}
if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1) {
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA)
del_timer_sync(&ictx->ttimer);
mutex_unlock(&ictx->lock);
if (!ictx->display_isopen)
free_imon_context(ictx);
} else {
if (ictx->ir_type == IR_TYPE_RC6)
del_timer_sync(&ictx->itimer);
mutex_unlock(&ictx->lock);
}
mutex_unlock(&driver_lock);
dev_dbg(dev, "%s: iMON device (intf%d) disconnected\n",
__func__, ifnum);
}
static int imon_suspend(struct usb_interface *intf, pm_message_t message)
{
struct imon_context *ictx = usb_get_intfdata(intf);
int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
if (ifnum == 0)
usb_kill_urb(ictx->rx_urb_intf0);
else
usb_kill_urb(ictx->rx_urb_intf1);
return 0;
}
static int imon_resume(struct usb_interface *intf)
{
int rc = 0;
struct imon_context *ictx = usb_get_intfdata(intf);
int ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
if (ifnum == 0) {
usb_fill_int_urb(ictx->rx_urb_intf0, ictx->usbdev_intf0,
usb_rcvintpipe(ictx->usbdev_intf0,
ictx->rx_endpoint_intf0->bEndpointAddress),
ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
usb_rx_callback_intf0, ictx,
ictx->rx_endpoint_intf0->bInterval);
rc = usb_submit_urb(ictx->rx_urb_intf0, GFP_ATOMIC);
} else {
usb_fill_int_urb(ictx->rx_urb_intf1, ictx->usbdev_intf1,
usb_rcvintpipe(ictx->usbdev_intf1,
ictx->rx_endpoint_intf1->bEndpointAddress),
ictx->usb_rx_buf, sizeof(ictx->usb_rx_buf),
usb_rx_callback_intf1, ictx,
ictx->rx_endpoint_intf1->bInterval);
rc = usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
}
return rc;
}
static int __init imon_init(void)
{
int rc;
rc = usb_register(&imon_driver);
if (rc) {
err("%s: usb register failed(%d)", __func__, rc);
rc = -ENODEV;
}
return rc;
}
static void __exit imon_exit(void)
{
usb_deregister(&imon_driver);
}
module_init(imon_init);
module_exit(imon_exit);
Reference in a new issue View git blame Copy permalink