--- /dev/null
+/*
+ * 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.
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
+
+#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/ratelimit.h>
+
+#include <linux/input.h>
+#include <linux/usb.h>
+#include <linux/usb/input.h>
+#include <media/rc-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 "0.9.4"
+
+#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
+ 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_type; /* 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 */
+ 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 }
+ }
+};
+
+/*
+ * 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),
+ .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(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 */
+ 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 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_attr_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_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;
+ 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(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.
+ *
+ * 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_type)
+{
+ 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_type && !(*rc_type & rc->allowed_protocols))
+ dev_warn(dev, "Looks like you're trying to use an IR protocol "
+ "this device does not support\n");
+
+ if (*rc_type & RC_BIT_RC6_MCE) {
+ dev_dbg(dev, "Configuring IR receiver for MCE protocol\n");
+ ir_proto_packet[0] = 0x01;
+ *rc_type = RC_BIT_RC6_MCE;
+ } else if (*rc_type & RC_BIT_OTHER) {
+ 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_type = RC_BIT_OTHER;
+ } 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_type = RC_BIT_OTHER;
+ }
+
+ 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_type = *rc_type;
+ ictx->pad_mouse = false;
+
+out:
+ if (unlock)
+ mutex_unlock(&ictx->lock);
+
+ 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 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)
+{
+ int i;
+ u32 keycode = KEY_RESERVED;
+ struct imon_panel_key_table *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_type == RC_BIT_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) {
+ 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_type == RC_BIT_OTHER && 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;
+ int i;
+ u64 scancode;
+ int press_type = 0;
+ int msec;
+ struct timeval t;
+ static struct timeval prev_time = { 0, 0 };
+ 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_type == RC_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) & 0x1;
+ 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->display_type == IMON_DISPLAY_TYPE_VGA && 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: ", 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 (ktype != IMON_KEY_PANEL) {
+ if (press_type == 0)
+ rc_keyup(ictx->rdev);
+ else {
+ if (ictx->rc_type == RC_BIT_RC6_MCE ||
+ ictx->rc_type == RC_BIT_OTHER)
+ rc_keydown(ictx->rdev,
+ ictx->rc_type == RC_BIT_RC6_MCE ? RC_TYPE_RC6_MCE : RC_TYPE_OTHER,
+ 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);
+
+ do_gettimeofday(&t);
+ /* KEY_MUTE repeats from knob need to be suppressed */
+ if (ictx->kc == KEY_MUTE && ictx->kc == ictx->last_keycode) {
+ msec = tv2int(&t, &prev_time);
+ if (msec < 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_BIT_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 VFD, MCE IR */
+ case 0x46:
+ case 0x7e:
+ case 0x9e:
+ dev_info(ictx->dev, "0xffdc iMON VFD, MCE IR");
+ detected_display_type = IMON_DISPLAY_TYPE_VFD;
+ allowed_protos = RC_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_BIT_RC6_MCE;
+ 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 OTHER wasn't correct. */
+ allowed_protos |= RC_BIT_RC6_MCE;
+ break;
+ }
+
+ printk(KERN_CONT " (id 0x%02x)\n", ffdc_cfg_byte);
+
+ ictx->display_type = detected_display_type;
+ ictx->rc_type = 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;
+ const unsigned char fp_packet[] = { 0x40, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x88 };
+
+ rdev = rc_allocate_device();
+ 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->input_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;
+ rdev->driver_type = RC_DRIVER_SCANCODE;
+ rdev->allowed_protocols = RC_BIT_OTHER | RC_BIT_RC6_MCE; /* iMON PAD or 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_type;
+ }
+
+ imon_set_display_type(ictx);
+
+ if (ictx->rc_type == RC_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)
+{
+ struct imon_panel_key_table *key_table = ictx->dev_descr->key_table;
+ struct input_dev *idev;
+ int ret, i;
+
+ 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(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);
+ 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;
+
+ 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) {
+ pr_err("usb_alloc_urb failed for IR urb\n");
+ 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->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);
+ mutex_unlock(&ictx->lock);
+ usb_free_urb(rx_urb);
+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);
+ 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_all(&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);
Code Review / kvmfornfv.git / blobdiff