diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/rc/imon.c | 2596 |
1 files changed, 2596 insertions, 0 deletions
diff --git a/drivers/media/rc/imon.c b/drivers/media/rc/imon.c new file mode 100644 index 000000000..5719dda6e --- /dev/null +++ b/drivers/media/rc/imon.c @@ -0,0 +1,2596 @@ +// 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 */ + /* + * Fields for deferring free_imon_context(). + * + * Since reference to "struct imon_context" is stored into + * "struct file"->private_data, we need to remember + * how many file descriptors might access this "struct imon_context". + */ + refcount_t users; + /* + * Use a flag for telling display_open()/vfd_write()/lcd_write() that + * imon_disconnect() was already called. + */ + bool disconnected; + /* + * We need to wait for RCU grace period in order to allow + * display_open() to safely check ->disconnected and increment ->users. + */ + struct rcu_head rcu; +}; + +#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, +}; + +/* 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); + WARN_ON(ictx->dev_present_intf0); + usb_free_urb(ictx->rx_urb_intf0); + WARN_ON(ictx->dev_present_intf1); + usb_free_urb(ictx->rx_urb_intf1); + kfree_rcu(ictx, rcu); + + 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; + + 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; + } + + rcu_read_lock(); + ictx = usb_get_intfdata(interface); + if (!ictx || ictx->disconnected || !refcount_inc_not_zero(&ictx->users)) { + rcu_read_unlock(); + pr_err("no context found for minor %d\n", subminor); + retval = -ENODEV; + goto exit; + } + rcu_read_unlock(); + + 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); + + if (retval && refcount_dec_and_test(&ictx->users)) + free_imon_context(ictx); + +exit: + 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 = file->private_data; + int retval = 0; + + 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); + if (refcount_dec_and_test(&ictx->users)) + free_imon_context(ictx); + 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) */ + retval = wait_for_completion_interruptible( + &ictx->tx.finished); + if (retval) { + usb_kill_urb(ictx->tx_urb); + pr_err_ratelimited("task interrupted\n"); + } + + ictx->tx.busy = false; + 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) +{ + 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)); + + return send_packet(ictx); +} + +/* + * 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 = file->private_data; + static const unsigned char vfd_packet6[] = { + 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; + + if (ictx->disconnected) + return -ENODEV; + + if (mutex_lock_interruptible(&ictx->lock)) + return -ERESTARTSYS; + + 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 = file->private_data; + + if (ictx->disconnected) + 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; + 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); + + first_if = usb_ifnum_to_if(usbdev, 0); + if (!first_if) { + ret = -ENODEV; + goto fail; + } + + if (first_if->dev.driver != interface->dev.driver) { + dev_err(&interface->dev, "inconsistent driver matching\n"); + ret = -EINVAL; + goto fail; + } + + if (ifnum == 0) { + ictx = imon_init_intf0(interface, id); + if (!ictx) { + pr_err("failed to initialize context!\n"); + ret = -ENODEV; + goto fail; + } + refcount_set(&ictx->users, 1); + + } else { + /* this is the secondary interface on the device */ + struct imon_context *first_if_ctx = usb_get_intfdata(first_if); + + /* 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; + } + refcount_inc(&ictx->users); + + } + + usb_set_intfdata(interface, ictx); + + if (ifnum == 0) { + 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); + } + + dev_info(dev, "iMON device (%04x:%04x, intf%d) on usb<%d:%d> initialized\n", + vendor, product, ifnum, + usbdev->bus->busnum, usbdev->devnum); + + usb_put_dev(usbdev); + + return 0; + +fail: + 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; + + ictx = usb_get_intfdata(interface); + ictx->disconnected = true; + 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); + 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); + } + usb_put_dev(ictx->usbdev_intf0); + } else { + ictx->dev_present_intf1 = false; + usb_kill_urb(ictx->rx_urb_intf1); + if (ictx->display_type == IMON_DISPLAY_TYPE_VGA) { + del_timer_sync(&ictx->ttimer); + input_unregister_device(ictx->touch); + } + usb_put_dev(ictx->usbdev_intf1); + } + + if (refcount_dec_and_test(&ictx->users)) + free_imon_context(ictx); + + 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_NOIO); + + } 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_NOIO); + } + + return rc; +} + +module_usb_driver(imon_driver); |