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linux/drivers/media/rc/imon.c
Nil Yi c9458c6f8a media: rc: clean the freed urb pointer to avoid double free 
After freed rx_urb, we should set the second interface urb to NULL,
otherwise a double free would happen when the driver is removed
from the first interface.

Signed-off-by: Nil Yi <teroincn@163.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2021-09-30 10:07:43 +02:00

2598 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD
*
* Copyright(C) 2010 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/ktime.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/ratelimit.h>
#include <linux/input.h>
#include <linux/usb.h>
#include <linux/usb/input.h>
#include <media/rc-core.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 "0.9.4"
#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 __user *buf,
size_t n_bytes, loff_t *pos);
/* LCD file_operations override function prototypes */
static ssize_t lcd_write(struct file *file, const char __user *buf,
size_t n_bytes, loff_t *pos);
/*** G L O B A L S ***/
struct imon_panel_key_table {
u64 hw_code;
u32 keycode;
};
struct imon_usb_dev_descr {
__u16 flags;
#define IMON_NO_FLAGS 0
#define IMON_NEED_20MS_PKT_DELAY 1
#define IMON_SUPPRESS_REPEATED_KEYS 2
struct imon_panel_key_table key_table[];
};
struct imon_context {
struct device *dev;
/* 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];
unsigned int send_packet_delay;
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 rc_dev *rdev; /* rc-core device for remote */
struct input_dev *idev; /* input device for panel & IR mouse */
struct input_dev *touch; /* input device for touchscreen */
spinlock_t kc_lock; /* make sure we get keycodes right */
u32 kc; /* current input keycode */
u32 last_keycode; /* last reported input keycode */
u32 rc_scancode; /* the computed remote scancode */
u8 rc_toggle; /* the computed remote toggle bit */
u64 rc_proto; /* iMON or MCE (RC6) IR protocol? */
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_rdev[128]; /* rc input device name */
char phys_rdev[64]; /* rc input device phys path */
char name_idev[128]; /* input device name */
char phys_idev[64]; /* input device phys path */
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 */
const struct imon_usb_dev_descr *dev_descr;
/* device description with key */
/* table for front panels */
};
#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,
};
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 imon_usb_dev_descr imon_default_table = {
.flags = IMON_NO_FLAGS,
.key_table = {
{ 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
{ 0x000000001200ffeell, KEY_UP },
{ 0x000000001300ffeell, KEY_DOWN },
{ 0x000000001400ffeell, KEY_LEFT },
{ 0x000000001500ffeell, KEY_RIGHT },
{ 0x000000001600ffeell, KEY_ENTER },
{ 0x000000001700ffeell, KEY_ESC },
{ 0x000000001f00ffeell, KEY_AUDIO },
{ 0x000000002000ffeell, KEY_VIDEO },
{ 0x000000002100ffeell, KEY_CAMERA },
{ 0x000000002700ffeell, KEY_DVD },
{ 0x000000002300ffeell, KEY_TV },
{ 0x000000002b00ffeell, KEY_EXIT },
{ 0x000000002c00ffeell, KEY_SELECT },
{ 0x000000002d00ffeell, KEY_MENU },
{ 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 },
/* 0xffdc iMON MCE VFD */
{ 0x00010000ffffffeell, KEY_VOLUMEUP },
{ 0x01000000ffffffeell, KEY_VOLUMEDOWN },
{ 0x00000001ffffffeell, KEY_MUTE },
{ 0x0000000fffffffeell, KEY_MEDIA },
{ 0x00000012ffffffeell, KEY_UP },
{ 0x00000013ffffffeell, KEY_DOWN },
{ 0x00000014ffffffeell, KEY_LEFT },
{ 0x00000015ffffffeell, KEY_RIGHT },
{ 0x00000016ffffffeell, KEY_ENTER },
{ 0x00000017ffffffeell, KEY_ESC },
/* iMON Knob values */
{ 0x000100ffffffffeell, KEY_VOLUMEUP },
{ 0x010000ffffffffeell, KEY_VOLUMEDOWN },
{ 0x000008ffffffffeell, KEY_MUTE },
{ 0, KEY_RESERVED },
}
};
static const struct imon_usb_dev_descr imon_OEM_VFD = {
.flags = IMON_NEED_20MS_PKT_DELAY,
.key_table = {
{ 0x000000000f00ffeell, KEY_MEDIA }, /* Go */
{ 0x000000001200ffeell, KEY_UP },
{ 0x000000001300ffeell, KEY_DOWN },
{ 0x000000001400ffeell, KEY_LEFT },
{ 0x000000001500ffeell, KEY_RIGHT },
{ 0x000000001600ffeell, KEY_ENTER },
{ 0x000000001700ffeell, KEY_ESC },
{ 0x000000001f00ffeell, KEY_AUDIO },
{ 0x000000002b00ffeell, KEY_EXIT },
{ 0x000000002c00ffeell, KEY_SELECT },
{ 0x000000002d00ffeell, KEY_MENU },
{ 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 },
/* 0xffdc iMON MCE VFD */
{ 0x00010000ffffffeell, KEY_VOLUMEUP },
{ 0x01000000ffffffeell, KEY_VOLUMEDOWN },
{ 0x00000001ffffffeell, KEY_MUTE },
{ 0x0000000fffffffeell, KEY_MEDIA },
{ 0x00000012ffffffeell, KEY_UP },
{ 0x00000013ffffffeell, KEY_DOWN },
{ 0x00000014ffffffeell, KEY_LEFT },
{ 0x00000015ffffffeell, KEY_RIGHT },
{ 0x00000016ffffffeell, KEY_ENTER },
{ 0x00000017ffffffeell, KEY_ESC },
/* iMON Knob values */
{ 0x000100ffffffffeell, KEY_VOLUMEUP },
{ 0x010000ffffffffeell, KEY_VOLUMEDOWN },
{ 0x000008ffffffffeell, KEY_MUTE },
{ 0, KEY_RESERVED },
}
};
/* imon receiver front panel/knob key table for DH102*/
static const struct imon_usb_dev_descr imon_DH102 = {
.flags = IMON_NO_FLAGS,
.key_table = {
{ 0x000100000000ffeell, KEY_VOLUMEUP },
{ 0x010000000000ffeell, KEY_VOLUMEDOWN },
{ 0x000000010000ffeell, KEY_MUTE },
{ 0x0000000f0000ffeell, KEY_MEDIA },
{ 0x000000120000ffeell, KEY_UP },
{ 0x000000130000ffeell, KEY_DOWN },
{ 0x000000140000ffeell, KEY_LEFT },
{ 0x000000150000ffeell, KEY_RIGHT },
{ 0x000000160000ffeell, KEY_ENTER },
{ 0x000000170000ffeell, KEY_ESC },
{ 0x0000002b0000ffeell, KEY_EXIT },
{ 0x0000002c0000ffeell, KEY_SELECT },
{ 0x0000002d0000ffeell, KEY_MENU },
{ 0, KEY_RESERVED }
}
};
/* imon ultrabay front panel key table */
static const struct imon_usb_dev_descr ultrabay_table = {
.flags = IMON_SUPPRESS_REPEATED_KEYS,
.key_table = {
{ 0x0000000f0000ffeell, KEY_MEDIA }, /* Go */
{ 0x000000000100ffeell, KEY_UP },
{ 0x000000000001ffeell, KEY_DOWN },
{ 0x000000160000ffeell, KEY_ENTER },
{ 0x0000001f0000ffeell, KEY_AUDIO }, /* Music */
{ 0x000000200000ffeell, KEY_VIDEO }, /* Movie */
{ 0x000000210000ffeell, KEY_CAMERA }, /* Photo */
{ 0x000000270000ffeell, KEY_DVD }, /* DVD */
{ 0x000000230000ffeell, KEY_TV }, /* TV */
{ 0x000000050000ffeell, KEY_PREVIOUS }, /* Previous */
{ 0x000000070000ffeell, KEY_REWIND },
{ 0x000000040000ffeell, KEY_STOP },
{ 0x000000020000ffeell, KEY_PLAYPAUSE },
{ 0x000000080000ffeell, KEY_FASTFORWARD },
{ 0x000000060000ffeell, KEY_NEXT }, /* Next */
{ 0x000100000000ffeell, KEY_VOLUMEUP },
{ 0x010000000000ffeell, KEY_VOLUMEDOWN },
{ 0x000000010000ffeell, KEY_MUTE },
{ 0, KEY_RESERVED },
}
};
/*
* 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 const 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),
.driver_info = (unsigned long)&imon_default_table },
/*
* 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),
.driver_info = (unsigned long)&imon_DH102 },
/* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */
{ USB_DEVICE(0x15c2, 0x0035),
.driver_info = (unsigned long)&imon_default_table},
/* SoundGraph iMON OEM VFD (IR & VFD) */
{ USB_DEVICE(0x15c2, 0x0036),
.driver_info = (unsigned long)&imon_OEM_VFD },
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0037),
.driver_info = (unsigned long)&imon_default_table},
/* SoundGraph iMON OEM LCD (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0038),
.driver_info = (unsigned long)&imon_default_table},
/* SoundGraph iMON UltraBay (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0039),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003a),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003b),
.driver_info = (unsigned long)&imon_default_table},
/* SoundGraph iMON OEM Inside (IR only) */
{ USB_DEVICE(0x15c2, 0x003c),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003d),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003e),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x003f),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0040),
.driver_info = (unsigned long)&imon_default_table},
/* SoundGraph iMON MINI (IR only) */
{ USB_DEVICE(0x15c2, 0x0041),
.driver_info = (unsigned long)&imon_default_table},
/* Antec Veris Multimedia Station EZ External (IR only) */
{ USB_DEVICE(0x15c2, 0x0042),
.driver_info = (unsigned long)&imon_default_table},
/* Antec Veris Multimedia Station Basic Internal (IR only) */
{ USB_DEVICE(0x15c2, 0x0043),
.driver_info = (unsigned long)&imon_default_table},
/* Antec Veris Multimedia Station Elite (IR & VFD) */
{ USB_DEVICE(0x15c2, 0x0044),
.driver_info = (unsigned long)&imon_default_table},
/* Antec Veris Multimedia Station Premiere (IR & LCD) */
{ USB_DEVICE(0x15c2, 0x0045),
.driver_info = (unsigned long)&imon_default_table},
/* device specifics unknown */
{ USB_DEVICE(0x15c2, 0x0046),
.driver_info = (unsigned long)&imon_default_table},
{}
};
/* 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,
};
/* 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) {
pr_err("could not find interface for minor %d\n", subminor);
retval = -ENODEV;
goto exit;
}
ictx = usb_get_intfdata(interface);
if (!ictx) {
pr_err("no context found for minor %d\n", subminor);
retval = -ENODEV;
goto exit;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
pr_err("display not supported by device\n");
retval = -ENODEV;
} else if (ictx->display_isopen) {
pr_err("display port is already open\n");
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) {
pr_err("no context for device\n");
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
pr_err("display not supported by device\n");
retval = -ENODEV;
} else if (!ictx->display_isopen) {
pr_err("display is not open\n");
retval = -EIO;
} else {
ictx->display_isopen = false;
dev_dbg(ictx->dev, "display port closed\n");
}
mutex_unlock(&ictx->lock);
return retval;
}
/*
* Sends a packet to the device -- this function must be called with
* ictx->lock held, or its unlock/lock sequence while waiting for tx
* to complete can/will lead to a deadlock.
*/
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(*control_req), 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;
}
reinit_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 */
pr_err_ratelimited("error submitting urb(%d)\n", retval);
} else {
/* Wait for transmission to complete (or abort) */
mutex_unlock(&ictx->lock);
retval = wait_for_completion_interruptible(
&ictx->tx.finished);
if (retval) {
usb_kill_urb(ictx->tx_urb);
pr_err_ratelimited("task interrupted\n");
}
mutex_lock(&ictx->lock);
retval = ictx->tx.status;
if (retval)
pr_err_ratelimited("packet tx failed (%d)\n", retval);
}
kfree(control_req);
/*
* Induce a mandatory 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(ictx->send_packet_delay);
set_current_state(TASK_INTERRUPTIBLE);
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) {
pr_err("no context for device\n");
return -ENODEV;
}
if (!ictx->dev_present_intf0) {
pr_err("no iMON device present\n");
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) {
pr_err("no context for device\n");
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) {
pr_err("send_packet failed for packet %d\n", i);
break;
}
}
return retval;
}
/*
* These are the sysfs functions to handle the association on the iMON 2.4G LT.
*/
static ssize_t associate_remote_show(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)
strscpy(buf, "associating\n", PAGE_SIZE);
else
strscpy(buf, "closed\n", PAGE_SIZE);
dev_info(d, "Visit https://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 associate_remote_store(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 imon_clock_show(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 imon_clock_store(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_RW(imon_clock);
static DEVICE_ATTR_RW(associate_remote);
static struct attribute *imon_display_sysfs_entries[] = {
&dev_attr_imon_clock.attr,
NULL
};
static const struct attribute_group imon_display_attr_group = {
.attrs = imon_display_sysfs_entries
};
static struct attribute *imon_rf_sysfs_entries[] = {
&dev_attr_associate_remote.attr,
NULL
};
static const struct attribute_group imon_rf_attr_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 __user *buf,
size_t n_bytes, loff_t *pos)
{
int i;
int offset;
int seq;
int retval = 0;
struct imon_context *ictx;
static const unsigned char vfd_packet6[] = {
0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
ictx = file->private_data;
if (!ictx) {
pr_err_ratelimited("no context for device\n");
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->dev_present_intf0) {
pr_err_ratelimited("no iMON device present\n");
retval = -ENODEV;
goto exit;
}
if (n_bytes <= 0 || n_bytes > 32) {
pr_err_ratelimited("invalid payload size\n");
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) {
pr_err_ratelimited("send packet #%d failed\n", 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)
pr_err_ratelimited("send packet #%d failed\n", 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 __user *buf,
size_t n_bytes, loff_t *pos)
{
int retval = 0;
struct imon_context *ictx;
ictx = file->private_data;
if (!ictx) {
pr_err_ratelimited("no context for device\n");
return -ENODEV;
}
mutex_lock(&ictx->lock);
if (!ictx->display_supported) {
pr_err_ratelimited("no iMON display present\n");
retval = -ENODEV;
goto exit;
}
if (n_bytes != 8) {
pr_err_ratelimited("invalid payload size: %d (expected 8)\n",
(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) {
pr_err_ratelimited("send packet failed!\n");
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);
}
/*
* report touchscreen input
*/
static void imon_touch_display_timeout(struct timer_list *t)
{
struct imon_context *ictx = from_timer(ictx, t, ttimer);
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.
*
* This function gets called two different ways, one way is from
* rc_register_device, for initial protocol selection/setup, and the other is
* via a userspace-initiated protocol change request, either by direct sysfs
* prodding or by something like ir-keytable. In the rc_register_device case,
* the imon context lock is already held, but when initiated from userspace,
* it is not, so we must acquire it prior to calling send_packet, which
* requires that the lock is held.
*/
static int imon_ir_change_protocol(struct rc_dev *rc, u64 *rc_proto)
{
int retval;
struct imon_context *ictx = rc->priv;
struct device *dev = ictx->dev;
bool unlock = false;
unsigned char ir_proto_packet[] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 };
if (*rc_proto && !(*rc_proto & rc->allowed_protocols))
dev_warn(dev, "Looks like you're trying to use an IR protocol this device does not support\n");
if (*rc_proto & RC_PROTO_BIT_RC6_MCE) {
dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
ir_proto_packet[0] = 0x01;
*rc_proto = RC_PROTO_BIT_RC6_MCE;
} else if (*rc_proto & RC_PROTO_BIT_IMON) {
dev_dbg(dev, "Configuring IR receiver for iMON protocol\n");
if (!pad_stabilize)
dev_dbg(dev, "PAD stabilize functionality disabled\n");
/* ir_proto_packet[0] = 0x00; // already the default */
*rc_proto = RC_PROTO_BIT_IMON;
} else {
dev_warn(dev, "Unsupported IR protocol specified, overriding to iMON IR protocol\n");
if (!pad_stabilize)
dev_dbg(dev, "PAD stabilize functionality disabled\n");
/* ir_proto_packet[0] = 0x00; // already the default */
*rc_proto = RC_PROTO_BIT_IMON;
}
memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet));
if (!mutex_is_locked(&ictx->lock)) {
unlock = true;
mutex_lock(&ictx->lock);
}
retval = send_packet(ictx);
if (retval)
goto out;
ictx->rc_proto = *rc_proto;
ictx->pad_mouse = false;
out:
if (unlock)
mutex_unlock(&ictx->lock);
return retval;
}
/*
* 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)
{
ktime_t ct;
static ktime_t prev_time;
static ktime_t hit_time;
static int x, y, prev_result, hits;
int result = 0;
long msec, msec_hit;
ct = ktime_get();
msec = ktime_ms_delta(ct, prev_time);
msec_hit = ktime_ms_delta(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 scancode)
{
u32 keycode;
u32 release;
bool is_release_code = false;
/* Look for the initial press of a button */
keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
ictx->rc_toggle = 0x0;
ictx->rc_scancode = scancode;
/* Look for the release of a button */
if (keycode == KEY_RESERVED) {
release = scancode & ~0x4000;
keycode = rc_g_keycode_from_table(ictx->rdev, 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 scancode)
{
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 & 0x80000000)
scancode = scancode | MCE_KEY_MASK | MCE_TOGGLE_BIT;
ictx->rc_scancode = scancode;
keycode = rc_g_keycode_from_table(ictx->rdev, scancode);
/* not used in mce mode, but make sure we know its false */
ictx->release_code = false;
return keycode;
}
static u32 imon_panel_key_lookup(struct imon_context *ictx, u64 code)
{
const struct imon_panel_key_table *key_table;
u32 keycode = KEY_RESERVED;
int i;
key_table = ictx->dev_descr->key_table;
for (i = 0; key_table[i].hw_code != 0; i++) {
if (key_table[i].hw_code == (code | 0xffee)) {
keycode = key_table[i].keycode;
break;
}
}
ictx->release_code = false;
return keycode;
}
static bool imon_mouse_event(struct imon_context *ictx,
unsigned char *buf, int len)
{
signed char rel_x = 0x00, rel_y = 0x00;
u8 right_shift = 1;
bool mouse_input = true;
int dir = 0;
unsigned long flags;
spin_lock_irqsave(&ictx->kc_lock, flags);
/* 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;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
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);
spin_lock_irqsave(&ictx->kc_lock, flags);
ictx->last_keycode = ictx->kc;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
}
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;
signed char rel_x = 0x00, rel_y = 0x00;
u16 timeout, threshold;
u32 scancode = KEY_RESERVED;
unsigned long flags;
/*
* 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 tendency 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->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
if ((buf[1] == 0) && ((rel_x != 0) || (rel_y != 0))) {
dir = stabilize((int)rel_x, (int)rel_y,
timeout, threshold);
if (!dir) {
spin_lock_irqsave(&ictx->kc_lock,
flags);
ictx->kc = KEY_UNKNOWN;
spin_unlock_irqrestore(&ictx->kc_lock,
flags);
return;
}
buf[2] = dir & 0xFF;
buf[3] = (dir >> 8) & 0xFF;
scancode = be32_to_cpu(*((__be32 *)buf));
}
} else {
/*
* Hack alert: instead of using keycodes, we have
* to use hard-coded scancodes here...
*/
if (abs(rel_y) > abs(rel_x)) {
buf[2] = (rel_y > 0) ? 0x7F : 0x80;
buf[3] = 0;
if (rel_y > 0)
scancode = 0x01007f00; /* KEY_DOWN */
else
scancode = 0x01008000; /* KEY_UP */
} else {
buf[2] = 0;
buf[3] = (rel_x > 0) ? 0x7F : 0x80;
if (rel_x > 0)
scancode = 0x0100007f; /* KEY_RIGHT */
else
scancode = 0x01000080; /* 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 endianness. Extract direction from buffer, rotate endianness,
* 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->rc_proto == RC_PROTO_BIT_IMON && pad_stabilize) {
dir = stabilize((int)rel_x, (int)rel_y,
timeout, threshold);
if (!dir) {
spin_lock_irqsave(&ictx->kc_lock, flags);
ictx->kc = KEY_UNKNOWN;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
return;
}
buf[2] = dir & 0xFF;
buf[3] = (dir >> 8) & 0xFF;
scancode = be32_to_cpu(*((__be32 *)buf));
} else {
/*
* Hack alert: instead of using keycodes, we have
* to use hard-coded scancodes here...
*/
if (abs(rel_y) > abs(rel_x)) {
buf[2] = (rel_y > 0) ? 0x7F : 0x80;
buf[3] = 0;
if (rel_y > 0)
scancode = 0x01007f00; /* KEY_DOWN */
else
scancode = 0x01008000; /* KEY_UP */
} else {
buf[2] = 0;
buf[3] = (rel_x > 0) ? 0x7F : 0x80;
if (rel_x > 0)
scancode = 0x0100007f; /* KEY_RIGHT */
else
scancode = 0x01000080; /* KEY_LEFT */
}
}
}
if (scancode) {
spin_lock_irqsave(&ictx->kc_lock, flags);
ictx->kc = imon_remote_key_lookup(ictx, scancode);
spin_unlock_irqrestore(&ictx->kc_lock, flags);
}
}
/*
* figure out if these is a press or a release. We don't actually
* care about repeats, as those will be auto-generated within the IR
* subsystem for repeating scancodes.
*/
static int imon_parse_press_type(struct imon_context *ictx,
unsigned char *buf, u8 ktype)
{
int press_type = 0;
unsigned long flags;
spin_lock_irqsave(&ictx->kc_lock, flags);
/* 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, no keyup events */
else if (ktype == IMON_KEY_MCE) {
ictx->rc_toggle = buf[2];
press_type = 1;
/* 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;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
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;
unsigned long flags;
u32 kc;
u64 scancode;
int press_type = 0;
ktime_t t;
static ktime_t prev_time;
u8 ktype;
/* 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 */
if (len == 8 && buf[7] == 0xee) {
scancode = be64_to_cpu(*((__be64 *)buf));
ktype = IMON_KEY_PANEL;
kc = imon_panel_key_lookup(ictx, scancode);
ictx->release_code = false;
} else {
scancode = be32_to_cpu(*((__be32 *)buf));
if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE) {
ktype = IMON_KEY_IMON;
if (buf[0] == 0x80)
ktype = IMON_KEY_MCE;
kc = imon_mce_key_lookup(ictx, scancode);
} else {
ktype = IMON_KEY_IMON;
kc = imon_remote_key_lookup(ictx, scancode);
}
}
spin_lock_irqsave(&ictx->kc_lock, flags);
/* keyboard/mouse mode toggle button */
if (kc == KEY_KEYBOARD && !ictx->release_code) {
ictx->last_keycode = kc;
if (!nomouse) {
ictx->pad_mouse = !ictx->pad_mouse;
dev_dbg(dev, "toggling to %s mode\n",
ictx->pad_mouse ? "mouse" : "keyboard");
spin_unlock_irqrestore(&ictx->kc_lock, flags);
return;
} else {
ictx->pad_mouse = false;
dev_dbg(dev, "mouse mode disabled, passing key value\n");
}
}
ictx->kc = kc;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
/* send touchscreen events through input subsystem if touchpad data */
if (ictx->touch && len == 8 && buf[7] == 0x86) {
imon_touch_event(ictx, buf);
return;
/* 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);
}
if (debug) {
printk(KERN_INFO "intf%d decoded packet: %*ph\n",
intf, len, buf);
}
press_type = imon_parse_press_type(ictx, buf, ktype);
if (press_type < 0)
goto not_input_data;
if (ktype != IMON_KEY_PANEL) {
if (press_type == 0)
rc_keyup(ictx->rdev);
else {
enum rc_proto proto;
if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
proto = RC_PROTO_RC6_MCE;
else if (ictx->rc_proto == RC_PROTO_BIT_IMON)
proto = RC_PROTO_IMON;
else
return;
rc_keydown(ictx->rdev, proto, ictx->rc_scancode,
ictx->rc_toggle);
spin_lock_irqsave(&ictx->kc_lock, flags);
ictx->last_keycode = ictx->kc;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
}
return;
}
/* Only panel type events left to process now */
spin_lock_irqsave(&ictx->kc_lock, flags);
t = ktime_get();
/* KEY repeats from knob and panel that need to be suppressed */
if (ictx->kc == KEY_MUTE ||
ictx->dev_descr->flags & IMON_SUPPRESS_REPEATED_KEYS) {
if (ictx->kc == ictx->last_keycode &&
ktime_ms_delta(t, prev_time) < ictx->idev->rep[REP_DELAY]) {
spin_unlock_irqrestore(&ictx->kc_lock, flags);
return;
}
}
prev_time = t;
kc = ictx->kc;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
input_report_key(ictx->idev, kc, press_type);
input_sync(ictx->idev);
/* panel keys don't generate a release */
input_report_key(ictx->idev, kc, 0);
input_sync(ictx->idev);
spin_lock_irqsave(&ictx->kc_lock, flags);
ictx->last_keycode = kc;
spin_unlock_irqrestore(&ictx->kc_lock, flags);
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;
/*
* if we get a callback before we're done configuring the hardware, we
* can't yet process the data, as there's nowhere to send it, but we
* still need to submit a new rx URB to avoid wedging the hardware
*/
if (!ictx->dev_present_intf0)
goto out;
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;
}
out:
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;
/*
* if we get a callback before we're done configuring the hardware, we
* can't yet process the data, as there's nowhere to send it, but we
* still need to submit a new rx URB to avoid wedging the hardware
*/
if (!ictx->dev_present_intf1)
goto out;
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;
}
out:
usb_submit_urb(ictx->rx_urb_intf1, GFP_ATOMIC);
}
/*
* 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 = RC_PROTO_BIT_IMON;
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 0x30:
case 0x85:
dev_info(ictx->dev, "0xffdc iMON VFD, iMON IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
break;
/* iMON VFD, MCE IR */
case 0x46:
case 0x9e:
dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
allowed_protos = RC_PROTO_BIT_RC6_MCE;
break;
/* iMON VFD, iMON or MCE IR */
case 0x7e:
dev_info(ictx->dev, "0xffdc iMON VFD, iMON or MCE IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
allowed_protos |= RC_PROTO_BIT_RC6_MCE;
break;
/* iMON LCD, MCE IR */
case 0x9f:
dev_info(ictx->dev, "0xffdc iMON LCD, MCE IR");
detected_display_type = IMON_DISPLAY_TYPE_LCD;
allowed_protos = RC_PROTO_BIT_RC6_MCE;
break;
/* no display, iMON IR */
case 0x26:
dev_info(ictx->dev, "0xffdc iMON Inside, iMON IR");
ictx->display_supported = false;
break;
/* Soundgraph iMON UltraBay */
case 0x98:
dev_info(ictx->dev, "0xffdc iMON UltraBay, LCD + IR");
detected_display_type = IMON_DISPLAY_TYPE_LCD;
allowed_protos = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
ictx->dev_descr = &ultrabay_table;
break;
default:
dev_info(ictx->dev, "Unknown 0xffdc device, defaulting to VFD and iMON IR");
detected_display_type = IMON_DISPLAY_TYPE_VFD;
/*
* We don't know which one it is, allow user to set the
* RC6 one from userspace if IMON wasn't correct.
*/
allowed_protos |= RC_PROTO_BIT_RC6_MCE;
break;
}
printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
ictx->display_type = detected_display_type;
ictx->rc_proto = allowed_protos;
}
static void imon_set_display_type(struct imon_context *ictx)
{
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 struct rc_dev *imon_init_rdev(struct imon_context *ictx)
{
struct rc_dev *rdev;
int ret;
static const unsigned char fp_packet[] = {
0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88 };
rdev = rc_allocate_device(RC_DRIVER_SCANCODE);
if (!rdev) {
dev_err(ictx->dev, "remote control dev allocation failed\n");
goto out;
}
snprintf(ictx->name_rdev, sizeof(ictx->name_rdev),
"iMON Remote (%04x:%04x)", ictx->vendor, ictx->product);
usb_make_path(ictx->usbdev_intf0, ictx->phys_rdev,
sizeof(ictx->phys_rdev));
strlcat(ictx->phys_rdev, "/input0", sizeof(ictx->phys_rdev));
rdev->device_name = ictx->name_rdev;
rdev->input_phys = ictx->phys_rdev;
usb_to_input_id(ictx->usbdev_intf0, &rdev->input_id);
rdev->dev.parent = ictx->dev;
rdev->priv = ictx;
/* iMON PAD or MCE */
rdev->allowed_protocols = RC_PROTO_BIT_IMON | RC_PROTO_BIT_RC6_MCE;
rdev->change_protocol = imon_ir_change_protocol;
rdev->driver_name = MOD_NAME;
/* 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(ictx->dev, "panel buttons/knobs setup failed\n");
if (ictx->product == 0xffdc) {
imon_get_ffdc_type(ictx);
rdev->allowed_protocols = ictx->rc_proto;
}
imon_set_display_type(ictx);
if (ictx->rc_proto == RC_PROTO_BIT_RC6_MCE)
rdev->map_name = RC_MAP_IMON_MCE;
else
rdev->map_name = RC_MAP_IMON_PAD;
ret = rc_register_device(rdev);
if (ret < 0) {
dev_err(ictx->dev, "remote input dev register failed\n");
goto out;
}
return rdev;
out:
rc_free_device(rdev);
return NULL;
}
static struct input_dev *imon_init_idev(struct imon_context *ictx)
{
const struct imon_panel_key_table *key_table;
struct input_dev *idev;
int ret, i;
key_table = ictx->dev_descr->key_table;
idev = input_allocate_device();
if (!idev)
goto out;
snprintf(ictx->name_idev, sizeof(ictx->name_idev),
"iMON Panel, Knob and Mouse(%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, "/input1", 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; key_table[i].hw_code != 0; i++) {
u32 kc = key_table[i].keycode;
__set_bit(kc, idev->keybit);
}
usb_to_input_id(ictx->usbdev_intf0, &idev->id);
idev->dev.parent = ictx->dev;
input_set_drvdata(idev, ictx);
ret = input_register_device(idev);
if (ret < 0) {
dev_err(ictx->dev, "input dev register failed\n");
goto out;
}
return idev;
out:
input_free_device(idev);
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)
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, "/input2", 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(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 = usb_endpoint_type(ep);
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)
pr_err("no valid input (IR) endpoint found\n");
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,
const struct usb_device_id *id)
{
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(*ictx), GFP_KERNEL);
if (!ictx)
goto exit;
rx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!rx_urb)
goto rx_urb_alloc_failed;
tx_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!tx_urb)
goto tx_urb_alloc_failed;
mutex_init(&ictx->lock);
spin_lock_init(&ictx->kc_lock);
mutex_lock(&ictx->lock);
ictx->dev = dev;
ictx->usbdev_intf0 = usb_get_dev(interface_to_usbdev(intf));
ictx->rx_urb_intf0 = rx_urb;
ictx->tx_urb = tx_urb;
ictx->rf_device = false;
init_completion(&ictx->tx.finished);
ictx->vendor = le16_to_cpu(ictx->usbdev_intf0->descriptor.idVendor);
ictx->product = le16_to_cpu(ictx->usbdev_intf0->descriptor.idProduct);
/* save drive info for later accessing the panel/knob key table */
ictx->dev_descr = (struct imon_usb_dev_descr *)id->driver_info;
/* default send_packet delay is 5ms but some devices need more */
ictx->send_packet_delay = ictx->dev_descr->flags &
IMON_NEED_20MS_PKT_DELAY ? 20 : 5;
ret = -ENODEV;
iface_desc = intf->cur_altsetting;
if (!imon_find_endpoints(ictx, iface_desc)) {
goto find_endpoint_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) {
pr_err("usb_submit_urb failed for intf0 (%d)\n", ret);
goto urb_submit_failed;
}
ictx->idev = imon_init_idev(ictx);
if (!ictx->idev) {
dev_err(dev, "%s: input device setup failed\n", __func__);
goto idev_setup_failed;
}
ictx->rdev = imon_init_rdev(ictx);
if (!ictx->rdev) {
dev_err(dev, "%s: rc device setup failed\n", __func__);
goto rdev_setup_failed;
}
ictx->dev_present_intf0 = true;
mutex_unlock(&ictx->lock);
return ictx;
rdev_setup_failed:
input_unregister_device(ictx->idev);
idev_setup_failed:
usb_kill_urb(ictx->rx_urb_intf0);
urb_submit_failed:
find_endpoint_failed:
usb_put_dev(ictx->usbdev_intf0);
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)
goto rx_urb_alloc_failed;
mutex_lock(&ictx->lock);
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
timer_setup(&ictx->ttimer, imon_touch_display_timeout, 0);
}
ictx->usbdev_intf1 = usb_get_dev(interface_to_usbdev(intf));
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) {
pr_err("usb_submit_urb failed for intf1 (%d)\n", ret);
goto urb_submit_failed;
}
ictx->dev_present_intf1 = true;
mutex_unlock(&ictx->lock);
return ictx;
urb_submit_failed:
if (ictx->touch)
input_unregister_device(ictx->touch);
touch_setup_failed:
find_endpoint_failed:
usb_put_dev(ictx->usbdev_intf1);
ictx->usbdev_intf1 = NULL;
mutex_unlock(&ictx->lock);
usb_free_urb(rx_urb);
ictx->rx_urb_intf1 = NULL;
rx_urb_alloc_failed:
dev_err(ictx->dev, "unable to initialize intf1, err %d\n", ret);
return NULL;
}
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_attr_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 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, sysfs_err;
int ret = 0;
struct imon_context *ictx = NULL;
struct imon_context *first_if_ctx = NULL;
u16 vendor, product;
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);
if (!first_if) {
ret = -ENODEV;
goto fail;
}
first_if_ctx = usb_get_intfdata(first_if);
if (ifnum == 0) {
ictx = imon_init_intf0(interface, id);
if (!ictx) {
pr_err("failed to initialize context!\n");
ret = -ENODEV;
goto fail;
}
} else {
/* this is the secondary interface on the device */
/* fail early if first intf failed to register */
if (!first_if_ctx) {
ret = -ENODEV;
goto fail;
}
ictx = imon_init_intf1(interface, first_if_ctx);
if (!ictx) {
pr_err("failed to attach to context!\n");
ret = -ENODEV;
goto fail;
}
}
usb_set_intfdata(interface, ictx);
if (ifnum == 0) {
mutex_lock(&ictx->lock);
if (product == 0xffdc && ictx->rf_device) {
sysfs_err = sysfs_create_group(&interface->dev.kobj,
&imon_rf_attr_group);
if (sysfs_err)
pr_err("Could not create RF sysfs entries(%d)\n",
sysfs_err);
}
if (ictx->display_supported)
imon_init_display(ictx, interface);
mutex_unlock(&ictx->lock);
}
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(&driver_lock);
usb_put_dev(usbdev);
return 0;
fail:
mutex_unlock(&driver_lock);
usb_put_dev(usbdev);
dev_err(dev, "unable to register, err %d\n", ret);
return ret;
}
/*
* Callback function for USB core API: disconnect
*/
static void 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;
/*
* sysfs_remove_group is safe to call even if sysfs_create_group
* hasn't been called
*/
sysfs_remove_group(&interface->dev.kobj, &imon_display_attr_group);
sysfs_remove_group(&interface->dev.kobj, &imon_rf_attr_group);
usb_set_intfdata(interface, NULL);
/* Abort ongoing write */
if (ictx->tx.busy) {
usb_kill_urb(ictx->tx_urb);
complete(&ictx->tx.finished);
}
if (ifnum == 0) {
ictx->dev_present_intf0 = false;
usb_kill_urb(ictx->rx_urb_intf0);
usb_put_dev(ictx->usbdev_intf0);
input_unregister_device(ictx->idev);
rc_unregister_device(ictx->rdev);
if (ictx->display_supported) {
if (ictx->display_type == IMON_DISPLAY_TYPE_LCD)
usb_deregister_dev(interface, &imon_lcd_class);
else if (ictx->display_type == IMON_DISPLAY_TYPE_VFD)
usb_deregister_dev(interface, &imon_vfd_class);
}
} else {
ictx->dev_present_intf1 = false;
usb_kill_urb(ictx->rx_urb_intf1);
usb_put_dev(ictx->usbdev_intf1);
if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) {
input_unregister_device(ictx->touch);
del_timer_sync(&ictx->ttimer);
}
}
if (!ictx->dev_present_intf0 && !ictx->dev_present_intf1)
free_imon_context(ictx);
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;
}
module_usb_driver(imon_driver);
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