diff options
Diffstat (limited to 'drivers/media/IR/imon.c')
| -rw-r--r-- | drivers/media/IR/imon.c | 2396 |
1 files changed, 2396 insertions, 0 deletions
diff --git a/drivers/media/IR/imon.c b/drivers/media/IR/imon.c new file mode 100644 index 00000000000..5e204567000 --- /dev/null +++ b/drivers/media/IR/imon.c @@ -0,0 +1,2396 @@ +/* + * imon.c: input and display driver for SoundGraph iMON IR/VFD/LCD + * + * Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com> + * Portions based on the original lirc_imon driver, + * Copyright(C) 2004 Venky Raju(dev@venky.ws) + * + * Huge thanks to R. Geoff Newbury for invaluable debugging on the + * 0xffdc iMON devices, and for sending me one to hack on, without + * which the support for them wouldn't be nearly as good. Thanks + * also to the numerous 0xffdc device owners that tested auto-config + * support for me and provided debug dumps from their devices. + * + * imon is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +#include <linux/input.h> +#include <linux/usb.h> +#include <linux/usb/input.h> +#include <media/ir-core.h> + +#include <linux/time.h> +#include <linux/timer.h> + +#define MOD_AUTHOR "Jarod Wilson <jarod@wilsonet.com>" +#define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display" +#define MOD_NAME "imon" +#define MOD_VERSION "0.9.1" + +#define DISPLAY_MINOR_BASE 144 +#define DEVICE_NAME "lcd%d" + +#define BUF_CHUNK_SIZE 8 +#define BUF_SIZE 128 + +#define BIT_DURATION 250 /* each bit received is 250us */ + +#define IMON_CLOCK_ENABLE_PACKETS 2 + +/*** P R O T O T Y P E S ***/ + +/* USB Callback prototypes */ +static int imon_probe(struct usb_interface *interface, + const struct usb_device_id *id); +static void imon_disconnect(struct usb_interface *interface); +static void usb_rx_callback_intf0(struct urb *urb); +static void usb_rx_callback_intf1(struct urb *urb); +static void usb_tx_callback(struct urb *urb); + +/* suspend/resume support */ +static int imon_resume(struct usb_interface *intf); +static int imon_suspend(struct usb_interface *intf, pm_message_t message); + +/* Display file_operations function prototypes */ +static int display_open(struct inode *inode, struct file *file); +static int display_close(struct inode *inode, struct file *file); + +/* VFD write operation */ +static ssize_t vfd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos); + +/* LCD file_operations override function prototypes */ +static ssize_t lcd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos); + +/*** G L O B A L S ***/ + +struct imon_context { + struct device *dev; + struct ir_dev_props *props; + struct ir_input_dev *ir; + /* 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_isassociating; /* RF remote associating */ + bool dev_present_intf0; /* USB device presence, interface 0 */ + bool dev_present_intf1; /* USB device presence, interface 1 */ + + struct mutex lock; /* to lock this object */ + wait_queue_head_t remove_ok; /* For unexpected USB disconnects */ + + struct usb_endpoint_descriptor *rx_endpoint_intf0; + struct usb_endpoint_descriptor *rx_endpoint_intf1; + struct usb_endpoint_descriptor *tx_endpoint; + struct urb *rx_urb_intf0; + struct urb *rx_urb_intf1; + struct urb *tx_urb; + bool tx_control; + unsigned char usb_rx_buf[8]; + unsigned char usb_tx_buf[8]; + + struct tx_t { + unsigned char data_buf[35]; /* user data buffer */ + struct completion finished; /* wait for write to finish */ + bool busy; /* write in progress */ + int status; /* status of tx completion */ + } tx; + + u16 vendor; /* usb vendor ID */ + u16 product; /* usb product ID */ + + struct input_dev *idev; /* input device for remote */ + struct input_dev *touch; /* input device for touchscreen */ + + u32 kc; /* current input keycode */ + u32 last_keycode; /* last reported input keycode */ + u64 ir_type; /* iMON or MCE (RC6) IR protocol? */ + u8 mce_toggle_bit; /* last mce toggle bit */ + bool release_code; /* some keys send a release code */ + + u8 display_type; /* store the display type */ + bool pad_mouse; /* toggle kbd(0)/mouse(1) mode */ + + char name_idev[128]; /* input device name */ + char phys_idev[64]; /* input device phys path */ + struct timer_list itimer; /* input device timer, need for rc6 */ + + char name_touch[128]; /* touch screen name */ + char phys_touch[64]; /* touch screen phys path */ + struct timer_list ttimer; /* touch screen timer */ + int touch_x; /* x coordinate on touchscreen */ + int touch_y; /* y coordinate on touchscreen */ +}; + +#define TOUCH_TIMEOUT (HZ/30) + +/* vfd character device file operations */ +static const struct file_operations vfd_fops = { + .owner = THIS_MODULE, + .open = &display_open, + .write = &vfd_write, + .release = &display_close +}; + +/* lcd character device file operations */ +static const struct file_operations lcd_fops = { + .owner = THIS_MODULE, + .open = &display_open, + .write = &lcd_write, + .release = &display_close +}; + +enum { + IMON_DISPLAY_TYPE_AUTO = 0, + IMON_DISPLAY_TYPE_VFD = 1, + IMON_DISPLAY_TYPE_LCD = 2, + IMON_DISPLAY_TYPE_VGA = 3, + IMON_DISPLAY_TYPE_NONE = 4, +}; + +enum { + IMON_KEY_IMON = 0, + IMON_KEY_MCE = 1, + IMON_KEY_PANEL = 2, +}; + +/* + * USB Device ID for iMON USB Control Boards + * + * The Windows drivers contain 6 different inf files, more or less one for + * each new device until the 0x0034-0x0046 devices, which all use the same + * driver. Some of the devices in the 34-46 range haven't been definitively + * identified yet. Early devices have either a TriGem Computer, Inc. or a + * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later + * devices use the SoundGraph vendor ID (0x15c2). This driver only supports + * the ffdc and later devices, which do onboard decoding. + */ +static struct usb_device_id imon_usb_id_table[] = { + /* + * Several devices with this same device ID, all use iMON_PAD.inf + * SoundGraph iMON PAD (IR & VFD) + * SoundGraph iMON PAD (IR & LCD) + * SoundGraph iMON Knob (IR only) + */ + { USB_DEVICE(0x15c2, 0xffdc) }, + + /* + * Newer devices, all driven by the latest iMON Windows driver, full + * list of device IDs extracted via 'strings Setup/data1.hdr |grep 15c2' + * Need user input to fill in details on unknown devices. + */ + /* SoundGraph iMON OEM Touch LCD (IR & 7" VGA LCD) */ + { USB_DEVICE(0x15c2, 0x0034) }, + /* SoundGraph iMON OEM Touch LCD (IR & 4.3" VGA LCD) */ + { USB_DEVICE(0x15c2, 0x0035) }, + /* SoundGraph iMON OEM VFD (IR & VFD) */ + { USB_DEVICE(0x15c2, 0x0036) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x0037) }, + /* SoundGraph iMON OEM LCD (IR & LCD) */ + { USB_DEVICE(0x15c2, 0x0038) }, + /* SoundGraph iMON UltraBay (IR & LCD) */ + { USB_DEVICE(0x15c2, 0x0039) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x003a) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x003b) }, + /* SoundGraph iMON OEM Inside (IR only) */ + { USB_DEVICE(0x15c2, 0x003c) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x003d) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x003e) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x003f) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x0040) }, + /* SoundGraph iMON MINI (IR only) */ + { USB_DEVICE(0x15c2, 0x0041) }, + /* Antec Veris Multimedia Station EZ External (IR only) */ + { USB_DEVICE(0x15c2, 0x0042) }, + /* Antec Veris Multimedia Station Basic Internal (IR only) */ + { USB_DEVICE(0x15c2, 0x0043) }, + /* Antec Veris Multimedia Station Elite (IR & VFD) */ + { USB_DEVICE(0x15c2, 0x0044) }, + /* Antec Veris Multimedia Station Premiere (IR & LCD) */ + { USB_DEVICE(0x15c2, 0x0045) }, + /* device specifics unknown */ + { USB_DEVICE(0x15c2, 0x0046) }, + {} +}; + +/* USB Device data */ +static struct usb_driver imon_driver = { + .name = MOD_NAME, + .probe = imon_probe, + .disconnect = imon_disconnect, + .suspend = imon_suspend, + .resume = imon_resume, + .id_table = imon_usb_id_table, +}; + +static struct usb_class_driver imon_vfd_class = { + .name = DEVICE_NAME, + .fops = &vfd_fops, + .minor_base = DISPLAY_MINOR_BASE, +}; + +static struct usb_class_driver imon_lcd_class = { + .name = DEVICE_NAME, + .fops = &lcd_fops, + .minor_base = DISPLAY_MINOR_BASE, +}; + +/* imon receiver front panel/knob key table */ +static const struct { + u64 hw_code; + u32 keycode; +} imon_panel_key_table[] = { + { 0x000000000f00ffeell, KEY_PROG1 }, /* Go */ + { 0x000000001f00ffeell, KEY_AUDIO }, + { 0x000000002000ffeell, KEY_VIDEO }, + { 0x000000002100ffeell, KEY_CAMERA }, + { 0x000000002700ffeell, KEY_DVD }, + { 0x000000002300ffeell, KEY_TV }, + { 0x000000000500ffeell, KEY_PREVIOUS }, + { 0x000000000700ffeell, KEY_REWIND }, + { 0x000000000400ffeell, KEY_STOP }, + { 0x000000003c00ffeell, KEY_PLAYPAUSE }, + { 0x000000000800ffeell, KEY_FASTFORWARD }, + { 0x000000000600ffeell, KEY_NEXT }, + { 0x000000010000ffeell, KEY_RIGHT }, + { 0x000001000000ffeell, KEY_LEFT }, + { 0x000000003d00ffeell, KEY_SELECT }, + { 0x000100000000ffeell, KEY_VOLUMEUP }, + { 0x010000000000ffeell, KEY_VOLUMEDOWN }, + { 0x000000000100ffeell, KEY_MUTE }, + /* iMON Knob values */ + { 0x000100ffffffffeell, KEY_VOLUMEUP }, + { 0x010000ffffffffeell, KEY_VOLUMEDOWN }, + { 0x000008ffffffffeell, KEY_MUTE }, +}; + +/* to prevent races between open() and disconnect(), probing, etc */ +static DEFINE_MUTEX(driver_lock); + +/* Module bookkeeping bits */ +MODULE_AUTHOR(MOD_AUTHOR); +MODULE_DESCRIPTION(MOD_DESC); +MODULE_VERSION(MOD_VERSION); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(usb, imon_usb_id_table); + +static bool debug; +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)"); + +/* lcd, vfd, vga or none? should be auto-detected, but can be overridden... */ +static int display_type; +module_param(display_type, int, S_IRUGO); +MODULE_PARM_DESC(display_type, "Type of attached display. 0=autodetect, " + "1=vfd, 2=lcd, 3=vga, 4=none (default: autodetect)"); + +static int pad_stabilize = 1; +module_param(pad_stabilize, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(pad_stabilize, "Apply stabilization algorithm to iMON PAD " + "presses in arrow key mode. 0=disable, 1=enable (default)."); + +/* + * In certain use cases, mouse mode isn't really helpful, and could actually + * cause confusion, so allow disabling it when the IR device is open. + */ +static bool nomouse; +module_param(nomouse, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(nomouse, "Disable mouse input device mode when IR device is " + "open. 0=don't disable, 1=disable. (default: don't disable)"); + +/* threshold at which a pad push registers as an arrow key in kbd mode */ +static int pad_thresh; +module_param(pad_thresh, int, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(pad_thresh, "Threshold at which a pad push registers as an " + "arrow key in kbd mode (default: 28)"); + + +static void free_imon_context(struct imon_context *ictx) +{ + struct device *dev = ictx->dev; + + usb_free_urb(ictx->tx_urb); + usb_free_urb(ictx->rx_urb_intf0); + usb_free_urb(ictx->rx_urb_intf1); + kfree(ictx); + + dev_dbg(dev, "%s: iMON context freed\n", __func__); +} + +/** + * Called when the Display device (e.g. /dev/lcd0) + * is opened by the application. + */ +static int display_open(struct inode *inode, struct file *file) +{ + struct usb_interface *interface; + struct imon_context *ictx = NULL; + int subminor; + int retval = 0; + + /* prevent races with disconnect */ + mutex_lock(&driver_lock); + + subminor = iminor(inode); + interface = usb_find_interface(&imon_driver, subminor); + if (!interface) { + err("%s: could not find interface for minor %d", + __func__, subminor); + retval = -ENODEV; + goto exit; + } + ictx = usb_get_intfdata(interface); + + if (!ictx) { + err("%s: no context found for minor %d", __func__, subminor); + retval = -ENODEV; + goto exit; + } + + mutex_lock(&ictx->lock); + + if (!ictx->display_supported) { + err("%s: display not supported by device", __func__); + retval = -ENODEV; + } else if (ictx->display_isopen) { + err("%s: display port is already open", __func__); + retval = -EBUSY; + } else { + ictx->display_isopen = 1; + 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 = (struct imon_context *)file->private_data; + + if (!ictx) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&ictx->lock); + + if (!ictx->display_supported) { + err("%s: display not supported by device", __func__); + retval = -ENODEV; + } else if (!ictx->display_isopen) { + err("%s: display is not open", __func__); + retval = -EIO; + } else { + ictx->display_isopen = 0; + dev_dbg(ictx->dev, "display port closed\n"); + if (!ictx->dev_present_intf0) { + /* + * Device disconnected before close and IR port is not + * open. If IR port is open, context will be deleted by + * ir_close. + */ + mutex_unlock(&ictx->lock); + free_imon_context(ictx); + return retval; + } + } + + mutex_unlock(&ictx->lock); + return retval; +} + +/** + * Sends a packet to the device -- this function must be called + * with ictx->lock held. + */ +static int send_packet(struct imon_context *ictx) +{ + unsigned int pipe; + unsigned long timeout; + int interval = 0; + int retval = 0; + struct usb_ctrlrequest *control_req = NULL; + + /* Check if we need to use control or interrupt urb */ + if (!ictx->tx_control) { + pipe = usb_sndintpipe(ictx->usbdev_intf0, + ictx->tx_endpoint->bEndpointAddress); + interval = ictx->tx_endpoint->bInterval; + + usb_fill_int_urb(ictx->tx_urb, ictx->usbdev_intf0, pipe, + ictx->usb_tx_buf, + sizeof(ictx->usb_tx_buf), + usb_tx_callback, ictx, interval); + + ictx->tx_urb->actual_length = 0; + } else { + /* fill request into kmalloc'ed space: */ + control_req = kmalloc(sizeof(struct usb_ctrlrequest), + GFP_KERNEL); + if (control_req == NULL) + return -ENOMEM; + + /* setup packet is '21 09 0200 0001 0008' */ + control_req->bRequestType = 0x21; + control_req->bRequest = 0x09; + control_req->wValue = cpu_to_le16(0x0200); + control_req->wIndex = cpu_to_le16(0x0001); + control_req->wLength = cpu_to_le16(0x0008); + + /* control pipe is endpoint 0x00 */ + pipe = usb_sndctrlpipe(ictx->usbdev_intf0, 0); + + /* build the control urb */ + usb_fill_control_urb(ictx->tx_urb, ictx->usbdev_intf0, + pipe, (unsigned char *)control_req, + ictx->usb_tx_buf, + sizeof(ictx->usb_tx_buf), + usb_tx_callback, ictx); + ictx->tx_urb->actual_length = 0; + } + + init_completion(&ictx->tx.finished); + ictx->tx.busy = 1; + smp_rmb(); /* ensure later readers know we're busy */ + + retval = usb_submit_urb(ictx->tx_urb, GFP_KERNEL); + if (retval) { + ictx->tx.busy = 0; + smp_rmb(); /* ensure later readers know we're not busy */ + err("%s: error submitting urb(%d)", __func__, retval); + } else { + /* Wait for transmission to complete (or abort) */ + mutex_unlock(&ictx->lock); + retval = wait_for_completion_interruptible( + &ictx->tx.finished); + if (retval) + err("%s: task interrupted", __func__); + mutex_lock(&ictx->lock); + + retval = ictx->tx.status; + if (retval) + err("%s: packet tx failed (%d)", __func__, retval); + } + + kfree(control_req); + + /* + * Induce a mandatory 5ms delay before returning, as otherwise, + * send_packet can get called so rapidly as to overwhelm the device, + * particularly on faster systems and/or those with quirky usb. + */ + timeout = msecs_to_jiffies(5); + set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(timeout); + + return retval; +} + +/** + * Sends an associate packet to the iMON 2.4G. + * + * This might not be such a good idea, since it has an id collision with + * some versions of the "IR & VFD" combo. The only way to determine if it + * is an RF version is to look at the product description string. (Which + * we currently do not fetch). + */ +static int send_associate_24g(struct imon_context *ictx) +{ + int retval; + const unsigned char packet[8] = { 0x01, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x20 }; + + if (!ictx) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + if (!ictx->dev_present_intf0) { + err("%s: no iMON device present", __func__); + return -ENODEV; + } + + memcpy(ictx->usb_tx_buf, packet, sizeof(packet)); + retval = send_packet(ictx); + + return retval; +} + +/** + * Sends packets to setup and show clock on iMON display + * + * Arguments: year - last 2 digits of year, month - 1..12, + * day - 1..31, dow - day of the week (0-Sun...6-Sat), + * hour - 0..23, minute - 0..59, second - 0..59 + */ +static int send_set_imon_clock(struct imon_context *ictx, + unsigned int year, unsigned int month, + unsigned int day, unsigned int dow, + unsigned int hour, unsigned int minute, + unsigned int second) +{ + unsigned char clock_enable_pkt[IMON_CLOCK_ENABLE_PACKETS][8]; + int retval = 0; + int i; + + if (!ictx) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + switch (ictx->display_type) { + case IMON_DISPLAY_TYPE_LCD: + clock_enable_pkt[0][0] = 0x80; + clock_enable_pkt[0][1] = year; + clock_enable_pkt[0][2] = month-1; + clock_enable_pkt[0][3] = day; + clock_enable_pkt[0][4] = hour; + clock_enable_pkt[0][5] = minute; + clock_enable_pkt[0][6] = second; + + clock_enable_pkt[1][0] = 0x80; + clock_enable_pkt[1][1] = 0; + clock_enable_pkt[1][2] = 0; + clock_enable_pkt[1][3] = 0; + clock_enable_pkt[1][4] = 0; + clock_enable_pkt[1][5] = 0; + clock_enable_pkt[1][6] = 0; + + if (ictx->product == 0xffdc) { + clock_enable_pkt[0][7] = 0x50; + clock_enable_pkt[1][7] = 0x51; + } else { + clock_enable_pkt[0][7] = 0x88; + clock_enable_pkt[1][7] = 0x8a; + } + + break; + + case IMON_DISPLAY_TYPE_VFD: + clock_enable_pkt[0][0] = year; + clock_enable_pkt[0][1] = month-1; + clock_enable_pkt[0][2] = day; + clock_enable_pkt[0][3] = dow; + clock_enable_pkt[0][4] = hour; + clock_enable_pkt[0][5] = minute; + clock_enable_pkt[0][6] = second; + clock_enable_pkt[0][7] = 0x40; + + clock_enable_pkt[1][0] = 0; + clock_enable_pkt[1][1] = 0; + clock_enable_pkt[1][2] = 1; + clock_enable_pkt[1][3] = 0; + clock_enable_pkt[1][4] = 0; + clock_enable_pkt[1][5] = 0; + clock_enable_pkt[1][6] = 0; + clock_enable_pkt[1][7] = 0x42; + + break; + + default: + return -ENODEV; + } + + for (i = 0; i < IMON_CLOCK_ENABLE_PACKETS; i++) { + memcpy(ictx->usb_tx_buf, clock_enable_pkt[i], 8); + retval = send_packet(ictx); + if (retval) { + err("%s: send_packet failed for packet %d", + __func__, i); + break; + } + } + + return retval; +} + +/** + * These are the sysfs functions to handle the association on the iMON 2.4G LT. + */ +static ssize_t show_associate_remote(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct imon_context *ictx = dev_get_drvdata(d); + + if (!ictx) + return -ENODEV; + + mutex_lock(&ictx->lock); + if (ictx->rf_isassociating) + strcpy(buf, "associating\n"); + else + strcpy(buf, "closed\n"); + + dev_info(d, "Visit http://www.lirc.org/html/imon-24g.html for " + "instructions on how to associate your iMON 2.4G DT/LT " + "remote\n"); + mutex_unlock(&ictx->lock); + return strlen(buf); +} + +static ssize_t store_associate_remote(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct imon_context *ictx; + + ictx = dev_get_drvdata(d); + + if (!ictx) + return -ENODEV; + + mutex_lock(&ictx->lock); + ictx->rf_isassociating = 1; + send_associate_24g(ictx); + mutex_unlock(&ictx->lock); + + return count; +} + +/** + * sysfs functions to control internal imon clock + */ +static ssize_t show_imon_clock(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct imon_context *ictx = dev_get_drvdata(d); + size_t len; + + if (!ictx) + return -ENODEV; + + mutex_lock(&ictx->lock); + + if (!ictx->display_supported) { + len = snprintf(buf, PAGE_SIZE, "Not supported."); + } else { + len = snprintf(buf, PAGE_SIZE, + "To set the clock on your iMON display:\n" + "# date \"+%%y %%m %%d %%w %%H %%M %%S\" > imon_clock\n" + "%s", ictx->display_isopen ? + "\nNOTE: imon device must be closed\n" : ""); + } + + mutex_unlock(&ictx->lock); + + return len; +} + +static ssize_t store_imon_clock(struct device *d, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct imon_context *ictx = dev_get_drvdata(d); + ssize_t retval; + unsigned int year, month, day, dow, hour, minute, second; + + if (!ictx) + return -ENODEV; + + mutex_lock(&ictx->lock); + + if (!ictx->display_supported) { + retval = -ENODEV; + goto exit; + } else if (ictx->display_isopen) { + retval = -EBUSY; + goto exit; + } + + if (sscanf(buf, "%u %u %u %u %u %u %u", &year, &month, &day, &dow, + &hour, &minute, &second) != 7) { + retval = -EINVAL; + goto exit; + } + + if ((month < 1 || month > 12) || + (day < 1 || day > 31) || (dow > 6) || + (hour > 23) || (minute > 59) || (second > 59)) { + retval = -EINVAL; + goto exit; + } + + retval = send_set_imon_clock(ictx, year, month, day, dow, + hour, minute, second); + if (retval) + goto exit; + + retval = count; +exit: + mutex_unlock(&ictx->lock); + + return retval; +} + + +static DEVICE_ATTR(imon_clock, S_IWUSR | S_IRUGO, show_imon_clock, + store_imon_clock); + +static DEVICE_ATTR(associate_remote, S_IWUSR | S_IRUGO, show_associate_remote, + store_associate_remote); + +static struct attribute *imon_display_sysfs_entries[] = { + &dev_attr_imon_clock.attr, + NULL +}; + +static struct attribute_group imon_display_attribute_group = { + .attrs = imon_display_sysfs_entries +}; + +static struct attribute *imon_rf_sysfs_entries[] = { + &dev_attr_associate_remote.attr, + NULL +}; + +static struct attribute_group imon_rf_attribute_group = { + .attrs = imon_rf_sysfs_entries +}; + +/** + * Writes data to the VFD. The iMON VFD is 2x16 characters + * and requires data in 5 consecutive USB interrupt packets, + * each packet but the last carrying 7 bytes. + * + * I don't know if the VFD board supports features such as + * scrolling, clearing rows, blanking, etc. so at + * the caller must provide a full screen of data. If fewer + * than 32 bytes are provided spaces will be appended to + * generate a full screen. + */ +static ssize_t vfd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos) +{ + int i; + int offset; + int seq; + int retval = 0; + struct imon_context *ictx; + const unsigned char vfd_packet6[] = { + 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF }; + + ictx = (struct imon_context *)file->private_data; + if (!ictx) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&ictx->lock); + + if (!ictx->dev_present_intf0) { + err("%s: no iMON device present", __func__); + retval = -ENODEV; + goto exit; + } + + if (n_bytes <= 0 || n_bytes > 32) { + err("%s: invalid payload size", __func__); + retval = -EINVAL; + goto exit; + } + + if (copy_from_user(ictx->tx.data_buf, buf, n_bytes)) { + retval = -EFAULT; + goto exit; + } + + /* Pad with spaces */ + for (i = n_bytes; i < 32; ++i) + ictx->tx.data_buf[i] = ' '; + + for (i = 32; i < 35; ++i) + ictx->tx.data_buf[i] = 0xFF; + + offset = 0; + seq = 0; + + do { + memcpy(ictx->usb_tx_buf, ictx->tx.data_buf + offset, 7); + ictx->usb_tx_buf[7] = (unsigned char) seq; + + retval = send_packet(ictx); + if (retval) { + err("%s: send packet failed for packet #%d", + __func__, seq/2); + goto exit; + } else { + seq += 2; + offset += 7; + } + + } while (offset < 35); + + /* Send packet #6 */ + memcpy(ictx->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6)); + ictx->usb_tx_buf[7] = (unsigned char) seq; + retval = send_packet(ictx); + if (retval) + err("%s: send packet failed for packet #%d", + __func__, seq / 2); + +exit: + mutex_unlock(&ictx->lock); + + return (!retval) ? n_bytes : retval; +} + +/** + * Writes data to the LCD. The iMON OEM LCD screen expects 8-byte + * packets. We accept data as 16 hexadecimal digits, followed by a + * newline (to make it easy to drive the device from a command-line + * -- even though the actual binary data is a bit complicated). + * + * The device itself is not a "traditional" text-mode display. It's + * actually a 16x96 pixel bitmap display. That means if you want to + * display text, you've got to have your own "font" and translate the + * text into bitmaps for display. This is really flexible (you can + * display whatever diacritics you need, and so on), but it's also + * a lot more complicated than most LCDs... + */ +static ssize_t lcd_write(struct file *file, const char *buf, + size_t n_bytes, loff_t *pos) +{ + int retval = 0; + struct imon_context *ictx; + + ictx = (struct imon_context *)file->private_data; + if (!ictx) { + err("%s: no context for device", __func__); + return -ENODEV; + } + + mutex_lock(&ictx->lock); + + if (!ictx->display_supported) { + err("%s: no iMON display present", __func__); + retval = -ENODEV; + goto exit; + } + + if (n_bytes != 8) { + err("%s: invalid payload size: %d (expecting 8)", + __func__, (int) n_bytes); + retval = -EINVAL; + goto exit; + } + + if (copy_from_user(ictx->usb_tx_buf, buf, 8)) { + retval = -EFAULT; + goto exit; + } + + retval = send_packet(ictx); + if (retval) { + err("%s: send packet failed!", __func__); + goto exit; + } else { + dev_dbg(ictx->dev, "%s: write %d bytes to LCD\n", + __func__, (int) n_bytes); + } +exit: + mutex_unlock(&ictx->lock); + return (!retval) ? n_bytes : retval; +} + +/** + * Callback function for USB core API: transmit data + */ +static void usb_tx_callback(struct urb *urb) +{ + struct imon_context *ictx; + + if (!urb) + return; + ictx = (struct imon_context *)urb->context; + if (!ictx) + return; + + ictx->tx.status = urb->status; + + /* notify waiters that write has finished */ + ictx->tx.busy = 0; + smp_rmb(); /* ensure later readers know we're not busy */ + complete(&ictx->tx.finished); +} + +/** + * mce/rc6 keypresses have no distinct release code, use timer + */ +static void imon_mce_timeout(unsigned long data) +{ + struct imon_context *ictx = (struct imon_context *)data; + + input_report_key(ictx->idev, ictx->last_keycode, 0); + input_sync(ictx->idev); +} + +/** + * report touchscreen input + */ +static void imon_touch_display_timeout(unsigned long data) +{ + struct imon_context *ictx = (struct imon_context *)data; + + if (ictx->display_type != IMON_DISPLAY_TYPE_VGA) + return; + + input_report_abs(ictx->touch, ABS_X, ictx->touch_x); + input_report_abs(ictx->touch, ABS_Y, ictx->touch_y); + input_report_key(ictx->touch, BTN_TOUCH, 0x00); + input_sync(ictx->touch); +} + +/** + * iMON IR receivers support two different signal sets -- those used by + * the iMON remotes, and those used by the Windows MCE remotes (which is + * really just RC-6), but only one or the other at a time, as the signals + * are decoded onboard the receiver. + */ +int imon_ir_change_protocol(void *priv, u64 ir_type) +{ + int retval; + struct imon_context *ictx = priv; + struct device *dev = ictx->dev; + bool pad_mouse; + unsigned char ir_proto_packet[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x86 }; + + if (ir_type && !(ir_type & ictx->props->allowed_protos)) + dev_warn(dev, "Looks like you're trying to use an IR protocol " + "this device does not support\n"); + + switch (ir_type) { + case IR_TYPE_RC6: + dev_dbg(dev, "Configuring IR receiver for MCE protocol\n"); + ir_proto_packet[0] = 0x01; + pad_mouse = false; + init_timer(&ictx->itimer); + ictx->itimer.data = (unsigned long)ictx; + ictx->itimer.function = imon_mce_timeout; + break; + case IR_TYPE_UNKNOWN: + case IR_TYPE_OTHER: + dev_dbg(dev, "Configuring IR receiver for iMON protocol\n"); + if (pad_stabilize) + pad_mouse = true; + else { + dev_dbg(dev, "PAD stabilize functionality disabled\n"); + pad_mouse = false; + } + /* ir_proto_packet[0] = 0x00; // already the default */ + ir_type = IR_TYPE_OTHER; + break; + default: + dev_warn(dev, "Unsupported IR protocol specified, overriding " + "to iMON IR protocol\n"); + if (pad_stabilize) + pad_mouse = true; + else { + dev_dbg(dev, "PAD stabilize functionality disabled\n"); + pad_mouse = false; + } + /* ir_proto_packet[0] = 0x00; // already the default */ + ir_type = IR_TYPE_OTHER; + break; + } + + memcpy(ictx->usb_tx_buf, &ir_proto_packet, sizeof(ir_proto_packet)); + + retval = send_packet(ictx); + if (retval) + goto out; + + ictx->ir_type = ir_type; + ictx->pad_mouse = pad_mouse; + +out: + return retval; +} + +static inline int tv2int(const struct timeval *a, const struct timeval *b) +{ + int usecs = 0; + int sec = 0; + + if (b->tv_usec > a->tv_usec) { + usecs = 1000000; + sec--; + } + + usecs += a->tv_usec - b->tv_usec; + + sec += a->tv_sec - b->tv_sec; + sec *= 1000; + usecs /= 1000; + sec += usecs; + + if (sec < 0) + sec = 1000; + + return sec; +} + +/** + * The directional pad behaves a bit differently, depending on whether this is + * one of the older ffdc devices or a newer device. Newer devices appear to + * have a higher resolution matrix for more precise mouse movement, but it + * makes things overly sensitive in keyboard mode, so we do some interesting + * contortions to make it less touchy. Older devices run through the same + * routine with shorter timeout and a smaller threshold. + */ +static int stabilize(int a, int b, u16 timeout, u16 threshold) +{ + struct timeval ct; + static struct timeval prev_time = {0, 0}; + static struct timeval hit_time = {0, 0}; + static int x, y, prev_result, hits; + int result = 0; + int msec, msec_hit; + + do_gettimeofday(&ct); + msec = tv2int(&ct, &prev_time); + msec_hit = tv2int(&ct, &hit_time); + + if (msec > 100) { + x = 0; + y = 0; + hits = 0; + } + + x += a; + y += b; + + prev_time = ct; + + if (abs(x) > threshold || abs(y) > threshold) { + if (abs(y) > abs(x)) + result = (y > 0) ? 0x7F : 0x80; + else + result = (x > 0) ? 0x7F00 : 0x8000; + + x = 0; + y = 0; + + if (result == prev_result) { + hits++; + + if (hits > 3) { + switch (result) { + case 0x7F: + y = 17 * threshold / 30; + break; + case 0x80: + y -= 17 * threshold / 30; + break; + case 0x7F00: + x = 17 * threshold / 30; + break; + case 0x8000: + x -= 17 * threshold / 30; + break; + } + } + + if (hits == 2 && msec_hit < timeout) { + result = 0; + hits = 1; + } + } else { + prev_result = result; + hits = 1; + hit_time = ct; + } + } + + return result; +} + +static u32 imon_remote_key_lookup(struct imon_context *ictx, u32 hw_code) +{ + u32 scancode = be32_to_cpu(hw_code); + u32 keycode; + u32 release; + bool is_release_code = false; + + /* Look for the initial press of a button */ + keycode = ir_g_keycode_from_table(ictx->idev, scancode); + + /* Look for the release of a button */ + if (keycode == KEY_RESERVED) { + release = scancode & ~0x4000; + keycode = ir_g_keycode_from_table(ictx->idev, release); + if (keycode != KEY_RESERVED) + is_release_code = true; + } + + ictx->release_code = is_release_code; + + return keycode; +} + +static u32 imon_mce_key_lookup(struct imon_context *ictx, u32 hw_code) +{ + u32 scancode = be32_to_cpu(hw_code); + u32 keycode; + +#define MCE_KEY_MASK 0x7000 +#define MCE_TOGGLE_BIT 0x8000 + + /* + * On some receivers, mce keys decode to 0x8000f04xx and 0x8000f84xx + * (the toggle bit flipping between alternating key presses), while + * on other receivers, we see 0x8000f74xx and 0x8000ff4xx. To keep + * the table trim, we always or in the bits to look up 0x8000ff4xx, + * but we can't or them into all codes, as some keys are decoded in + * a different way w/o the same use of the toggle bit... + */ + if ((scancode >> 24) & 0x80) < |