2 * lirc_imon.c: LIRC/VFD/LCD driver for SoundGraph iMON IR/VFD/LCD
3 * including the iMON PAD model
5 * Copyright(C) 2004 Venky Raju(dev@venky.ws)
6 * Copyright(C) 2009 Jarod Wilson <jarod@wilsonet.com>
8 * lirc_imon is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include <linux/errno.h>
24 #include <linux/init.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/uaccess.h>
29 #include <linux/usb.h>
31 #include <media/lirc.h>
32 #include <media/lirc_dev.h>
35 #define MOD_AUTHOR "Venky Raju <dev@venky.ws>"
36 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
37 #define MOD_NAME "lirc_imon"
38 #define MOD_VERSION "0.8"
40 #define DISPLAY_MINOR_BASE 144
41 #define DEVICE_NAME "lcd%d"
43 #define BUF_CHUNK_SIZE 4
46 #define BIT_DURATION 250 /* each bit received is 250us */
48 /*** P R O T O T Y P E S ***/
50 /* USB Callback prototypes */
51 static int imon_probe(struct usb_interface *interface,
52 const struct usb_device_id *id);
53 static void imon_disconnect(struct usb_interface *interface);
54 static void usb_rx_callback(struct urb *urb);
55 static void usb_tx_callback(struct urb *urb);
57 /* suspend/resume support */
58 static int imon_resume(struct usb_interface *intf);
59 static int imon_suspend(struct usb_interface *intf, pm_message_t message);
61 /* Display file_operations function prototypes */
62 static int display_open(struct inode *inode, struct file *file);
63 static int display_close(struct inode *inode, struct file *file);
65 /* VFD write operation */
66 static ssize_t vfd_write(struct file *file, const char *buf,
67 size_t n_bytes, loff_t *pos);
69 /* LIRC driver function prototypes */
70 static int ir_open(void *data);
71 static void ir_close(void *data);
73 /* Driver init/exit prototypes */
74 static int __init imon_init(void);
75 static void __exit imon_exit(void);
77 /*** G L O B A L S ***/
78 #define IMON_DATA_BUF_SZ 35
81 struct usb_device *usbdev;
82 /* Newer devices have two interfaces */
83 int display; /* not all controllers do */
84 int display_isopen; /* display port has been opened */
85 int ir_isopen; /* IR port open */
86 int dev_present; /* USB device presence */
87 struct mutex ctx_lock; /* to lock this object */
88 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
90 int vfd_proto_6p; /* some VFD require a 6th packet */
92 struct lirc_driver *driver;
93 struct usb_endpoint_descriptor *rx_endpoint;
94 struct usb_endpoint_descriptor *tx_endpoint;
97 unsigned char usb_rx_buf[8];
98 unsigned char usb_tx_buf[8];
101 int count; /* length of 0 or 1 sequence */
102 int prev_bit; /* logic level of sequence */
103 int initial_space; /* initial space flag */
107 unsigned char data_buf[IMON_DATA_BUF_SZ]; /* user data buffer */
108 struct completion finished; /* wait for write to finish */
109 atomic_t busy; /* write in progress */
110 int status; /* status of tx completion */
114 static const struct file_operations display_fops = {
115 .owner = THIS_MODULE,
116 .open = &display_open,
118 .release = &display_close,
119 .llseek = noop_llseek,
123 * USB Device ID for iMON USB Control Boards
125 * The Windows drivers contain 6 different inf files, more or less one for
126 * each new device until the 0x0034-0x0046 devices, which all use the same
127 * driver. Some of the devices in the 34-46 range haven't been definitively
128 * identified yet. Early devices have either a TriGem Computer, Inc. or a
129 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
130 * devices use the SoundGraph vendor ID (0x15c2).
132 static struct usb_device_id imon_usb_id_table[] = {
133 /* TriGem iMON (IR only) -- TG_iMON.inf */
134 { USB_DEVICE(0x0aa8, 0x8001) },
136 /* SoundGraph iMON (IR only) -- sg_imon.inf */
137 { USB_DEVICE(0x04e8, 0xff30) },
139 /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
140 { USB_DEVICE(0x0aa8, 0xffda) },
142 /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
143 { USB_DEVICE(0x15c2, 0xffda) },
148 /* Some iMON VFD models requires a 6th packet for VFD writes */
149 static struct usb_device_id vfd_proto_6p_list[] = {
150 { USB_DEVICE(0x15c2, 0xffda) },
154 /* Some iMON devices have no lcd/vfd, don't set one up */
155 static struct usb_device_id ir_only_list[] = {
156 { USB_DEVICE(0x0aa8, 0x8001) },
157 { USB_DEVICE(0x04e8, 0xff30) },
161 /* USB Device data */
162 static struct usb_driver imon_driver = {
165 .disconnect = imon_disconnect,
166 .suspend = imon_suspend,
167 .resume = imon_resume,
168 .id_table = imon_usb_id_table,
171 static struct usb_class_driver imon_class = {
173 .fops = &display_fops,
174 .minor_base = DISPLAY_MINOR_BASE,
177 /* to prevent races between open() and disconnect(), probing, etc */
178 static DEFINE_MUTEX(driver_lock);
182 /*** M O D U L E C O D E ***/
184 MODULE_AUTHOR(MOD_AUTHOR);
185 MODULE_DESCRIPTION(MOD_DESC);
186 MODULE_VERSION(MOD_VERSION);
187 MODULE_LICENSE("GPL");
188 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
189 module_param(debug, int, S_IRUGO | S_IWUSR);
190 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
192 static void free_imon_context(struct imon_context *context)
194 struct device *dev = context->driver->dev;
195 usb_free_urb(context->tx_urb);
196 usb_free_urb(context->rx_urb);
197 lirc_buffer_free(context->driver->rbuf);
198 kfree(context->driver->rbuf);
199 kfree(context->driver);
202 dev_dbg(dev, "%s: iMON context freed\n", __func__);
205 static void deregister_from_lirc(struct imon_context *context)
208 int minor = context->driver->minor;
210 retval = lirc_unregister_driver(minor);
212 err("%s: unable to deregister from lirc(%d)",
215 printk(KERN_INFO MOD_NAME ": Deregistered iMON driver "
216 "(minor:%d)\n", minor);
221 * Called when the Display device (e.g. /dev/lcd0)
222 * is opened by the application.
224 static int display_open(struct inode *inode, struct file *file)
226 struct usb_interface *interface;
227 struct imon_context *context = NULL;
231 /* prevent races with disconnect */
232 mutex_lock(&driver_lock);
234 subminor = iminor(inode);
235 interface = usb_find_interface(&imon_driver, subminor);
237 err("%s: could not find interface for minor %d",
242 context = usb_get_intfdata(interface);
245 err("%s: no context found for minor %d",
251 mutex_lock(&context->ctx_lock);
253 if (!context->display) {
254 err("%s: display not supported by device", __func__);
256 } else if (context->display_isopen) {
257 err("%s: display port is already open", __func__);
260 context->display_isopen = 1;
261 file->private_data = context;
262 dev_info(context->driver->dev, "display port opened\n");
265 mutex_unlock(&context->ctx_lock);
268 mutex_unlock(&driver_lock);
273 * Called when the display device (e.g. /dev/lcd0)
274 * is closed by the application.
276 static int display_close(struct inode *inode, struct file *file)
278 struct imon_context *context = NULL;
281 context = (struct imon_context *)file->private_data;
284 err("%s: no context for device", __func__);
288 mutex_lock(&context->ctx_lock);
290 if (!context->display) {
291 err("%s: display not supported by device", __func__);
293 } else if (!context->display_isopen) {
294 err("%s: display is not open", __func__);
297 context->display_isopen = 0;
298 dev_info(context->driver->dev, "display port closed\n");
299 if (!context->dev_present && !context->ir_isopen) {
301 * Device disconnected before close and IR port is not
302 * open. If IR port is open, context will be deleted by
305 mutex_unlock(&context->ctx_lock);
306 free_imon_context(context);
311 mutex_unlock(&context->ctx_lock);
316 * Sends a packet to the device -- this function must be called
317 * with context->ctx_lock held.
319 static int send_packet(struct imon_context *context)
324 struct usb_ctrlrequest *control_req = NULL;
326 /* Check if we need to use control or interrupt urb */
327 pipe = usb_sndintpipe(context->usbdev,
328 context->tx_endpoint->bEndpointAddress);
329 interval = context->tx_endpoint->bInterval;
331 usb_fill_int_urb(context->tx_urb, context->usbdev, pipe,
333 sizeof(context->usb_tx_buf),
334 usb_tx_callback, context, interval);
336 context->tx_urb->actual_length = 0;
338 init_completion(&context->tx.finished);
339 atomic_set(&(context->tx.busy), 1);
341 retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
343 atomic_set(&(context->tx.busy), 0);
344 err("%s: error submitting urb(%d)", __func__, retval);
346 /* Wait for transmission to complete (or abort) */
347 mutex_unlock(&context->ctx_lock);
348 retval = wait_for_completion_interruptible(
349 &context->tx.finished);
351 err("%s: task interrupted", __func__);
352 mutex_lock(&context->ctx_lock);
354 retval = context->tx.status;
356 err("%s: packet tx failed (%d)", __func__, retval);
365 * Writes data to the VFD. The iMON VFD is 2x16 characters
366 * and requires data in 5 consecutive USB interrupt packets,
367 * each packet but the last carrying 7 bytes.
369 * I don't know if the VFD board supports features such as
370 * scrolling, clearing rows, blanking, etc. so at
371 * the caller must provide a full screen of data. If fewer
372 * than 32 bytes are provided spaces will be appended to
373 * generate a full screen.
375 static ssize_t vfd_write(struct file *file, const char *buf,
376 size_t n_bytes, loff_t *pos)
382 struct imon_context *context;
383 const unsigned char vfd_packet6[] = {
384 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
387 context = (struct imon_context *)file->private_data;
389 err("%s: no context for device", __func__);
393 mutex_lock(&context->ctx_lock);
395 if (!context->dev_present) {
396 err("%s: no iMON device present", __func__);
401 if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) {
402 err("%s: invalid payload size", __func__);
407 data_buf = memdup_user(buf, n_bytes);
408 if (IS_ERR(data_buf)) {
409 retval = PTR_ERR(data_buf);
413 memcpy(context->tx.data_buf, data_buf, n_bytes);
415 /* Pad with spaces */
416 for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
417 context->tx.data_buf[i] = ' ';
419 for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
420 context->tx.data_buf[i] = 0xFF;
426 memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
427 context->usb_tx_buf[7] = (unsigned char) seq;
429 retval = send_packet(context);
431 err("%s: send packet failed for packet #%d",
439 } while (offset < IMON_DATA_BUF_SZ);
441 if (context->vfd_proto_6p) {
443 memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
444 context->usb_tx_buf[7] = (unsigned char) seq;
445 retval = send_packet(context);
447 err("%s: send packet failed for packet #%d",
452 mutex_unlock(&context->ctx_lock);
454 return (!retval) ? n_bytes : retval;
458 * Callback function for USB core API: transmit data
460 static void usb_tx_callback(struct urb *urb)
462 struct imon_context *context;
466 context = (struct imon_context *)urb->context;
470 context->tx.status = urb->status;
472 /* notify waiters that write has finished */
473 atomic_set(&context->tx.busy, 0);
474 complete(&context->tx.finished);
480 * Called by lirc_dev when the application opens /dev/lirc
482 static int ir_open(void *data)
485 struct imon_context *context;
487 /* prevent races with disconnect */
488 mutex_lock(&driver_lock);
490 context = (struct imon_context *)data;
492 /* initial IR protocol decode variables */
493 context->rx.count = 0;
494 context->rx.initial_space = 1;
495 context->rx.prev_bit = 0;
497 context->ir_isopen = 1;
498 dev_info(context->driver->dev, "IR port opened\n");
500 mutex_unlock(&driver_lock);
505 * Called by lirc_dev when the application closes /dev/lirc
507 static void ir_close(void *data)
509 struct imon_context *context;
511 context = (struct imon_context *)data;
513 err("%s: no context for device", __func__);
517 mutex_lock(&context->ctx_lock);
519 context->ir_isopen = 0;
520 dev_info(context->driver->dev, "IR port closed\n");
522 if (!context->dev_present) {
524 * Device disconnected while IR port was still open. Driver
525 * was not deregistered at disconnect time, so do it now.
527 deregister_from_lirc(context);
529 if (!context->display_isopen) {
530 mutex_unlock(&context->ctx_lock);
531 free_imon_context(context);
535 * If display port is open, context will be deleted by
540 mutex_unlock(&context->ctx_lock);
545 * Convert bit count to time duration (in us) and submit
546 * the value to lirc_dev.
548 static void submit_data(struct imon_context *context)
550 unsigned char buf[4];
551 int value = context->rx.count;
554 dev_dbg(context->driver->dev, "submitting data to LIRC\n");
556 value *= BIT_DURATION;
558 if (context->rx.prev_bit)
561 for (i = 0; i < 4; ++i)
562 buf[i] = value>>(i*8);
564 lirc_buffer_write(context->driver->rbuf, buf);
565 wake_up(&context->driver->rbuf->wait_poll);
569 static inline int tv2int(const struct timeval *a, const struct timeval *b)
574 if (b->tv_usec > a->tv_usec) {
579 usecs += a->tv_usec - b->tv_usec;
581 sec += a->tv_sec - b->tv_sec;
593 * Process the incoming packet
595 static void imon_incoming_packet(struct imon_context *context,
596 struct urb *urb, int intf)
598 int len = urb->actual_length;
599 unsigned char *buf = urb->transfer_buffer;
600 struct device *dev = context->driver->dev;
606 * just bail out if no listening IR client
608 if (!context->ir_isopen)
612 dev_warn(dev, "imon %s: invalid incoming packet "
613 "size (len = %d, intf%d)\n", __func__, len, intf);
618 printk(KERN_INFO "raw packet: ");
619 for (i = 0; i < len; ++i)
620 printk("%02x ", buf[i]);
625 * Translate received data to pulse and space lengths.
626 * Received data is active low, i.e. pulses are 0 and
629 * My original algorithm was essentially similar to
630 * Changwoo Ryu's with the exception that he switched
631 * the incoming bits to active high and also fed an
632 * initial space to LIRC at the start of a new sequence
633 * if the previous bit was a pulse.
635 * I've decided to adopt his algorithm.
638 if (buf[7] == 1 && context->rx.initial_space) {
639 /* LIRC requires a leading space */
640 context->rx.prev_bit = 0;
641 context->rx.count = 4;
642 submit_data(context);
643 context->rx.count = 0;
646 for (octet = 0; octet < 5; ++octet) {
648 for (bit = 0; bit < 8; ++bit) {
649 int curr_bit = !(buf[octet] & mask);
650 if (curr_bit != context->rx.prev_bit) {
651 if (context->rx.count) {
652 submit_data(context);
653 context->rx.count = 0;
655 context->rx.prev_bit = curr_bit;
662 if (chunk_num == 10) {
663 if (context->rx.count) {
664 submit_data(context);
665 context->rx.count = 0;
667 context->rx.initial_space = context->rx.prev_bit;
672 * Callback function for USB core API: receive data
674 static void usb_rx_callback(struct urb *urb)
676 struct imon_context *context;
684 context = (struct imon_context *)urb->context;
688 buf = urb->transfer_buffer;
689 len = urb->actual_length;
691 switch (urb->status) {
692 case -ENOENT: /* usbcore unlink successful! */
696 imon_incoming_packet(context, urb, intfnum);
700 dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n",
701 __func__, urb->status);
705 usb_submit_urb(context->rx_urb, GFP_ATOMIC);
711 * Callback function for USB core API: Probe
713 static int imon_probe(struct usb_interface *interface,
714 const struct usb_device_id *id)
716 struct usb_device *usbdev = NULL;
717 struct usb_host_interface *iface_desc = NULL;
718 struct usb_endpoint_descriptor *rx_endpoint = NULL;
719 struct usb_endpoint_descriptor *tx_endpoint = NULL;
720 struct urb *rx_urb = NULL;
721 struct urb *tx_urb = NULL;
722 struct lirc_driver *driver = NULL;
723 struct lirc_buffer *rbuf = NULL;
724 struct device *dev = &interface->dev;
729 int display_ep_found = 0;
731 int alloc_status = 0;
732 int vfd_proto_6p = 0;
734 struct imon_context *context = NULL;
738 context = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
740 err("%s: kzalloc failed for context", __func__);
742 goto alloc_status_switch;
746 * Try to auto-detect the type of display if the user hasn't set
747 * it by hand via the display_type modparam. Default is VFD.
749 if (usb_match_id(interface, ir_only_list))
750 context->display = 0;
752 context->display = 1;
754 code_length = BUF_CHUNK_SIZE * 8;
756 usbdev = usb_get_dev(interface_to_usbdev(interface));
757 iface_desc = interface->cur_altsetting;
758 num_endpts = iface_desc->desc.bNumEndpoints;
759 ifnum = iface_desc->desc.bInterfaceNumber;
760 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
761 product = le16_to_cpu(usbdev->descriptor.idProduct);
763 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
764 __func__, vendor, product, ifnum);
766 /* prevent races probing devices w/multiple interfaces */
767 mutex_lock(&driver_lock);
770 * Scan the endpoint list and set:
771 * first input endpoint = IR endpoint
772 * first output endpoint = display endpoint
774 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
775 struct usb_endpoint_descriptor *ep;
778 ep = &iface_desc->endpoint[i].desc;
779 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
780 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
783 ep_dir == USB_DIR_IN &&
784 ep_type == USB_ENDPOINT_XFER_INT) {
788 dev_dbg(dev, "%s: found IR endpoint\n", __func__);
790 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
791 ep_type == USB_ENDPOINT_XFER_INT) {
793 display_ep_found = 1;
794 dev_dbg(dev, "%s: found display endpoint\n", __func__);
799 * Some iMON receivers have no display. Unfortunately, it seems
800 * that SoundGraph recycles device IDs between devices both with
803 if (context->display == 0) {
804 display_ep_found = 0;
805 dev_dbg(dev, "%s: device has no display\n", __func__);
808 /* Input endpoint is mandatory */
810 err("%s: no valid input (IR) endpoint found.", __func__);
813 goto alloc_status_switch;
816 /* Determine if display requires 6 packets */
817 if (display_ep_found) {
818 if (usb_match_id(interface, vfd_proto_6p_list))
821 dev_dbg(dev, "%s: vfd_proto_6p: %d\n",
822 __func__, vfd_proto_6p);
825 driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
827 err("%s: kzalloc failed for lirc_driver", __func__);
829 goto alloc_status_switch;
831 rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
833 err("%s: kmalloc failed for lirc_buffer", __func__);
835 goto alloc_status_switch;
837 if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) {
838 err("%s: lirc_buffer_init failed", __func__);
840 goto alloc_status_switch;
842 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
844 err("%s: usb_alloc_urb failed for IR urb", __func__);
846 goto alloc_status_switch;
848 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
850 err("%s: usb_alloc_urb failed for display urb",
853 goto alloc_status_switch;
856 mutex_init(&context->ctx_lock);
857 context->vfd_proto_6p = vfd_proto_6p;
859 strcpy(driver->name, MOD_NAME);
861 driver->code_length = sizeof(int) * 8;
862 driver->sample_rate = 0;
863 driver->features = LIRC_CAN_REC_MODE2;
864 driver->data = context;
866 driver->set_use_inc = ir_open;
867 driver->set_use_dec = ir_close;
868 driver->dev = &interface->dev;
869 driver->owner = THIS_MODULE;
871 mutex_lock(&context->ctx_lock);
873 context->driver = driver;
874 /* start out in keyboard mode */
876 lirc_minor = lirc_register_driver(driver);
877 if (lirc_minor < 0) {
878 err("%s: lirc_register_driver failed", __func__);
880 goto alloc_status_switch;
882 dev_info(dev, "Registered iMON driver "
883 "(lirc minor: %d)\n", lirc_minor);
885 /* Needed while unregistering! */
886 driver->minor = lirc_minor;
888 context->usbdev = usbdev;
889 context->dev_present = 1;
890 context->rx_endpoint = rx_endpoint;
891 context->rx_urb = rx_urb;
894 * tx is used to send characters to lcd/vfd, associate RF
895 * remotes, set IR protocol, and maybe more...
897 context->tx_endpoint = tx_endpoint;
898 context->tx_urb = tx_urb;
900 if (display_ep_found)
901 context->display = 1;
903 usb_fill_int_urb(context->rx_urb, context->usbdev,
904 usb_rcvintpipe(context->usbdev,
905 context->rx_endpoint->bEndpointAddress),
906 context->usb_rx_buf, sizeof(context->usb_rx_buf),
907 usb_rx_callback, context,
908 context->rx_endpoint->bInterval);
910 retval = usb_submit_urb(context->rx_urb, GFP_KERNEL);
913 err("%s: usb_submit_urb failed for intf0 (%d)",
915 mutex_unlock(&context->ctx_lock);
919 usb_set_intfdata(interface, context);
921 if (context->display && ifnum == 0) {
922 dev_dbg(dev, "%s: Registering iMON display with sysfs\n",
925 if (usb_register_dev(interface, &imon_class)) {
926 /* Not a fatal error, so ignore */
927 dev_info(dev, "%s: could not get a minor number for "
928 "display\n", __func__);
932 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
933 "usb<%d:%d> initialized\n", vendor, product, ifnum,
934 usbdev->bus->busnum, usbdev->devnum);
937 mutex_unlock(&context->ctx_lock);
939 switch (alloc_status) {
941 usb_free_urb(tx_urb);
943 usb_free_urb(rx_urb);
946 lirc_buffer_free(rbuf);
955 if (retval != -ENODEV)
963 mutex_unlock(&driver_lock);
969 * Callback function for USB core API: disconnect
971 static void imon_disconnect(struct usb_interface *interface)
973 struct imon_context *context;
976 /* prevent races with ir_open()/display_open() */
977 mutex_lock(&driver_lock);
979 context = usb_get_intfdata(interface);
980 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
982 mutex_lock(&context->ctx_lock);
984 usb_set_intfdata(interface, NULL);
986 /* Abort ongoing write */
987 if (atomic_read(&context->tx.busy)) {
988 usb_kill_urb(context->tx_urb);
989 complete_all(&context->tx.finished);
992 context->dev_present = 0;
993 usb_kill_urb(context->rx_urb);
994 if (context->display)
995 usb_deregister_dev(interface, &imon_class);
997 if (!context->ir_isopen && !context->dev_present) {
998 deregister_from_lirc(context);
999 mutex_unlock(&context->ctx_lock);
1000 if (!context->display_isopen)
1001 free_imon_context(context);
1003 mutex_unlock(&context->ctx_lock);
1005 mutex_unlock(&driver_lock);
1007 printk(KERN_INFO "%s: iMON device (intf%d) disconnected\n",
1011 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
1013 struct imon_context *context = usb_get_intfdata(intf);
1015 usb_kill_urb(context->rx_urb);
1020 static int imon_resume(struct usb_interface *intf)
1023 struct imon_context *context = usb_get_intfdata(intf);
1025 usb_fill_int_urb(context->rx_urb, context->usbdev,
1026 usb_rcvintpipe(context->usbdev,
1027 context->rx_endpoint->bEndpointAddress),
1028 context->usb_rx_buf, sizeof(context->usb_rx_buf),
1029 usb_rx_callback, context,
1030 context->rx_endpoint->bInterval);
1032 rc = usb_submit_urb(context->rx_urb, GFP_ATOMIC);
1037 static int __init imon_init(void)
1041 printk(KERN_INFO MOD_NAME ": " MOD_DESC ", v" MOD_VERSION "\n");
1043 rc = usb_register(&imon_driver);
1045 err("%s: usb register failed(%d)", __func__, rc);
1052 static void __exit imon_exit(void)
1054 usb_deregister(&imon_driver);
1055 printk(KERN_INFO MOD_NAME ": module removed. Goodbye!\n");
1058 module_init(imon_init);
1059 module_exit(imon_exit);