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 __user *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 /*** G L O B A L S ***/
74 #define IMON_DATA_BUF_SZ 35
77 struct usb_device *usbdev;
78 /* Newer devices have two interfaces */
79 int display; /* not all controllers do */
80 int display_isopen; /* display port has been opened */
81 int ir_isopen; /* IR port open */
82 int dev_present; /* USB device presence */
83 struct mutex ctx_lock; /* to lock this object */
84 wait_queue_head_t remove_ok; /* For unexpected USB disconnects */
86 int vfd_proto_6p; /* some VFD require a 6th packet */
88 struct lirc_driver *driver;
89 struct usb_endpoint_descriptor *rx_endpoint;
90 struct usb_endpoint_descriptor *tx_endpoint;
93 unsigned char usb_rx_buf[8];
94 unsigned char usb_tx_buf[8];
97 int count; /* length of 0 or 1 sequence */
98 int prev_bit; /* logic level of sequence */
99 int initial_space; /* initial space flag */
103 unsigned char data_buf[IMON_DATA_BUF_SZ]; /* user data buffer */
104 struct completion finished; /* wait for write to finish */
105 atomic_t busy; /* write in progress */
106 int status; /* status of tx completion */
110 static const struct file_operations display_fops = {
111 .owner = THIS_MODULE,
112 .open = &display_open,
114 .release = &display_close,
115 .llseek = noop_llseek,
119 * USB Device ID for iMON USB Control Boards
121 * The Windows drivers contain 6 different inf files, more or less one for
122 * each new device until the 0x0034-0x0046 devices, which all use the same
123 * driver. Some of the devices in the 34-46 range haven't been definitively
124 * identified yet. Early devices have either a TriGem Computer, Inc. or a
125 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
126 * devices use the SoundGraph vendor ID (0x15c2).
128 static struct usb_device_id imon_usb_id_table[] = {
129 /* TriGem iMON (IR only) -- TG_iMON.inf */
130 { USB_DEVICE(0x0aa8, 0x8001) },
132 /* SoundGraph iMON (IR only) -- sg_imon.inf */
133 { USB_DEVICE(0x04e8, 0xff30) },
135 /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
136 { USB_DEVICE(0x0aa8, 0xffda) },
138 /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
139 { USB_DEVICE(0x15c2, 0xffda) },
144 /* Some iMON VFD models requires a 6th packet for VFD writes */
145 static struct usb_device_id vfd_proto_6p_list[] = {
146 { USB_DEVICE(0x15c2, 0xffda) },
150 /* Some iMON devices have no lcd/vfd, don't set one up */
151 static struct usb_device_id ir_only_list[] = {
152 { USB_DEVICE(0x0aa8, 0x8001) },
153 { USB_DEVICE(0x04e8, 0xff30) },
157 /* USB Device data */
158 static struct usb_driver imon_driver = {
161 .disconnect = imon_disconnect,
162 .suspend = imon_suspend,
163 .resume = imon_resume,
164 .id_table = imon_usb_id_table,
167 static struct usb_class_driver imon_class = {
169 .fops = &display_fops,
170 .minor_base = DISPLAY_MINOR_BASE,
173 /* to prevent races between open() and disconnect(), probing, etc */
174 static DEFINE_MUTEX(driver_lock);
178 /*** M O D U L E C O D E ***/
180 MODULE_AUTHOR(MOD_AUTHOR);
181 MODULE_DESCRIPTION(MOD_DESC);
182 MODULE_VERSION(MOD_VERSION);
183 MODULE_LICENSE("GPL");
184 MODULE_DEVICE_TABLE(usb, imon_usb_id_table);
185 module_param(debug, int, S_IRUGO | S_IWUSR);
186 MODULE_PARM_DESC(debug, "Debug messages: 0=no, 1=yes(default: no)");
188 static void free_imon_context(struct imon_context *context)
190 struct device *dev = context->driver->dev;
191 usb_free_urb(context->tx_urb);
192 usb_free_urb(context->rx_urb);
193 lirc_buffer_free(context->driver->rbuf);
194 kfree(context->driver->rbuf);
195 kfree(context->driver);
198 dev_dbg(dev, "%s: iMON context freed\n", __func__);
201 static void deregister_from_lirc(struct imon_context *context)
204 int minor = context->driver->minor;
206 retval = lirc_unregister_driver(minor);
208 printk(KERN_ERR KBUILD_MODNAME
209 ": %s: unable to deregister from lirc(%d)",
212 printk(KERN_INFO MOD_NAME ": Deregistered iMON driver "
213 "(minor:%d)\n", minor);
218 * Called when the Display device (e.g. /dev/lcd0)
219 * is opened by the application.
221 static int display_open(struct inode *inode, struct file *file)
223 struct usb_interface *interface;
224 struct imon_context *context = NULL;
228 /* prevent races with disconnect */
229 mutex_lock(&driver_lock);
231 subminor = iminor(inode);
232 interface = usb_find_interface(&imon_driver, subminor);
234 printk(KERN_ERR KBUILD_MODNAME
235 ": %s: could not find interface for minor %d\n",
240 context = usb_get_intfdata(interface);
243 dev_err(&interface->dev,
244 "%s: no context found for minor %d\n",
250 mutex_lock(&context->ctx_lock);
252 if (!context->display) {
253 dev_err(&interface->dev,
254 "%s: display not supported by device\n", __func__);
256 } else if (context->display_isopen) {
257 dev_err(&interface->dev,
258 "%s: display port is already open\n", __func__);
261 context->display_isopen = 1;
262 file->private_data = context;
263 dev_info(context->driver->dev, "display port opened\n");
266 mutex_unlock(&context->ctx_lock);
269 mutex_unlock(&driver_lock);
274 * Called when the display device (e.g. /dev/lcd0)
275 * is closed by the application.
277 static int display_close(struct inode *inode, struct file *file)
279 struct imon_context *context = NULL;
282 context = file->private_data;
285 printk(KERN_ERR KBUILD_MODNAME
286 "%s: no context for device\n", __func__);
290 mutex_lock(&context->ctx_lock);
292 if (!context->display) {
293 dev_err(&context->usbdev->dev,
294 "%s: display not supported by device\n", __func__);
296 } else if (!context->display_isopen) {
297 dev_err(&context->usbdev->dev,
298 "%s: display is not open\n", __func__);
301 context->display_isopen = 0;
302 dev_info(context->driver->dev, "display port closed\n");
303 if (!context->dev_present && !context->ir_isopen) {
305 * Device disconnected before close and IR port is not
306 * open. If IR port is open, context will be deleted by
309 mutex_unlock(&context->ctx_lock);
310 free_imon_context(context);
315 mutex_unlock(&context->ctx_lock);
320 * Sends a packet to the device -- this function must be called
321 * with context->ctx_lock held.
323 static int send_packet(struct imon_context *context)
329 /* Check if we need to use control or interrupt urb */
330 pipe = usb_sndintpipe(context->usbdev,
331 context->tx_endpoint->bEndpointAddress);
332 interval = context->tx_endpoint->bInterval;
334 usb_fill_int_urb(context->tx_urb, context->usbdev, pipe,
336 sizeof(context->usb_tx_buf),
337 usb_tx_callback, context, interval);
339 context->tx_urb->actual_length = 0;
341 init_completion(&context->tx.finished);
342 atomic_set(&(context->tx.busy), 1);
344 retval = usb_submit_urb(context->tx_urb, GFP_KERNEL);
346 atomic_set(&(context->tx.busy), 0);
347 dev_err(&context->usbdev->dev,
348 "%s: error submitting urb(%d)\n", __func__, retval);
350 /* Wait for transmission to complete (or abort) */
351 mutex_unlock(&context->ctx_lock);
352 retval = wait_for_completion_interruptible(
353 &context->tx.finished);
355 dev_err(&context->usbdev->dev,
356 "%s: task interrupted\n", __func__);
357 mutex_lock(&context->ctx_lock);
359 retval = context->tx.status;
361 dev_err(&context->usbdev->dev,
362 "%s: packet tx failed (%d)\n",
370 * Writes data to the VFD. The iMON VFD is 2x16 characters
371 * and requires data in 5 consecutive USB interrupt packets,
372 * each packet but the last carrying 7 bytes.
374 * I don't know if the VFD board supports features such as
375 * scrolling, clearing rows, blanking, etc. so at
376 * the caller must provide a full screen of data. If fewer
377 * than 32 bytes are provided spaces will be appended to
378 * generate a full screen.
380 static ssize_t vfd_write(struct file *file, const char __user *buf,
381 size_t n_bytes, loff_t *pos)
387 struct imon_context *context;
388 const unsigned char vfd_packet6[] = {
389 0x01, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF };
390 int *data_buf = NULL;
392 context = file->private_data;
394 printk(KERN_ERR KBUILD_MODNAME
395 "%s: no context for device\n", __func__);
399 mutex_lock(&context->ctx_lock);
401 if (!context->dev_present) {
402 dev_err(&context->usbdev->dev,
403 "%s: no iMON device present\n", __func__);
408 if (n_bytes <= 0 || n_bytes > IMON_DATA_BUF_SZ - 3) {
409 dev_err(&context->usbdev->dev,
410 "%s: invalid payload size\n", __func__);
415 data_buf = memdup_user(buf, n_bytes);
416 if (IS_ERR(data_buf)) {
417 retval = PTR_ERR(data_buf);
421 memcpy(context->tx.data_buf, data_buf, n_bytes);
423 /* Pad with spaces */
424 for (i = n_bytes; i < IMON_DATA_BUF_SZ - 3; ++i)
425 context->tx.data_buf[i] = ' ';
427 for (i = IMON_DATA_BUF_SZ - 3; i < IMON_DATA_BUF_SZ; ++i)
428 context->tx.data_buf[i] = 0xFF;
434 memcpy(context->usb_tx_buf, context->tx.data_buf + offset, 7);
435 context->usb_tx_buf[7] = (unsigned char) seq;
437 retval = send_packet(context);
439 dev_err(&context->usbdev->dev,
440 "%s: send packet failed for packet #%d\n",
448 } while (offset < IMON_DATA_BUF_SZ);
450 if (context->vfd_proto_6p) {
452 memcpy(context->usb_tx_buf, &vfd_packet6, sizeof(vfd_packet6));
453 context->usb_tx_buf[7] = (unsigned char) seq;
454 retval = send_packet(context);
456 dev_err(&context->usbdev->dev,
457 "%s: send packet failed for packet #%d\n",
462 mutex_unlock(&context->ctx_lock);
465 return (!retval) ? n_bytes : retval;
469 * Callback function for USB core API: transmit data
471 static void usb_tx_callback(struct urb *urb)
473 struct imon_context *context;
477 context = (struct imon_context *)urb->context;
481 context->tx.status = urb->status;
483 /* notify waiters that write has finished */
484 atomic_set(&context->tx.busy, 0);
485 complete(&context->tx.finished);
491 * Called by lirc_dev when the application opens /dev/lirc
493 static int ir_open(void *data)
496 struct imon_context *context;
498 /* prevent races with disconnect */
499 mutex_lock(&driver_lock);
501 context = (struct imon_context *)data;
503 /* initial IR protocol decode variables */
504 context->rx.count = 0;
505 context->rx.initial_space = 1;
506 context->rx.prev_bit = 0;
508 context->ir_isopen = 1;
509 dev_info(context->driver->dev, "IR port opened\n");
511 mutex_unlock(&driver_lock);
516 * Called by lirc_dev when the application closes /dev/lirc
518 static void ir_close(void *data)
520 struct imon_context *context;
522 context = (struct imon_context *)data;
524 printk(KERN_ERR KBUILD_MODNAME
525 "%s: no context for device\n", __func__);
529 mutex_lock(&context->ctx_lock);
531 context->ir_isopen = 0;
532 dev_info(context->driver->dev, "IR port closed\n");
534 if (!context->dev_present) {
536 * Device disconnected while IR port was still open. Driver
537 * was not deregistered at disconnect time, so do it now.
539 deregister_from_lirc(context);
541 if (!context->display_isopen) {
542 mutex_unlock(&context->ctx_lock);
543 free_imon_context(context);
547 * If display port is open, context will be deleted by
552 mutex_unlock(&context->ctx_lock);
557 * Convert bit count to time duration (in us) and submit
558 * the value to lirc_dev.
560 static void submit_data(struct imon_context *context)
562 unsigned char buf[4];
563 int value = context->rx.count;
566 dev_dbg(context->driver->dev, "submitting data to LIRC\n");
568 value *= BIT_DURATION;
570 if (context->rx.prev_bit)
573 for (i = 0; i < 4; ++i)
574 buf[i] = value>>(i*8);
576 lirc_buffer_write(context->driver->rbuf, buf);
577 wake_up(&context->driver->rbuf->wait_poll);
581 static inline int tv2int(const struct timeval *a, const struct timeval *b)
586 if (b->tv_usec > a->tv_usec) {
591 usecs += a->tv_usec - b->tv_usec;
593 sec += a->tv_sec - b->tv_sec;
605 * Process the incoming packet
607 static void imon_incoming_packet(struct imon_context *context,
608 struct urb *urb, int intf)
610 int len = urb->actual_length;
611 unsigned char *buf = urb->transfer_buffer;
612 struct device *dev = context->driver->dev;
618 * just bail out if no listening IR client
620 if (!context->ir_isopen)
624 dev_warn(dev, "imon %s: invalid incoming packet "
625 "size (len = %d, intf%d)\n", __func__, len, intf);
630 printk(KERN_INFO "raw packet: ");
631 for (i = 0; i < len; ++i)
632 printk("%02x ", buf[i]);
637 * Translate received data to pulse and space lengths.
638 * Received data is active low, i.e. pulses are 0 and
641 * My original algorithm was essentially similar to
642 * Changwoo Ryu's with the exception that he switched
643 * the incoming bits to active high and also fed an
644 * initial space to LIRC at the start of a new sequence
645 * if the previous bit was a pulse.
647 * I've decided to adopt his algorithm.
650 if (buf[7] == 1 && context->rx.initial_space) {
651 /* LIRC requires a leading space */
652 context->rx.prev_bit = 0;
653 context->rx.count = 4;
654 submit_data(context);
655 context->rx.count = 0;
658 for (octet = 0; octet < 5; ++octet) {
660 for (bit = 0; bit < 8; ++bit) {
661 int curr_bit = !(buf[octet] & mask);
662 if (curr_bit != context->rx.prev_bit) {
663 if (context->rx.count) {
664 submit_data(context);
665 context->rx.count = 0;
667 context->rx.prev_bit = curr_bit;
675 if (context->rx.count) {
676 submit_data(context);
677 context->rx.count = 0;
679 context->rx.initial_space = context->rx.prev_bit;
684 * Callback function for USB core API: receive data
686 static void usb_rx_callback(struct urb *urb)
688 struct imon_context *context;
694 context = (struct imon_context *)urb->context;
698 switch (urb->status) {
699 case -ENOENT: /* usbcore unlink successful! */
703 imon_incoming_packet(context, urb, intfnum);
707 dev_warn(context->driver->dev, "imon %s: status(%d): ignored\n",
708 __func__, urb->status);
712 usb_submit_urb(context->rx_urb, GFP_ATOMIC);
718 * Callback function for USB core API: Probe
720 static int imon_probe(struct usb_interface *interface,
721 const struct usb_device_id *id)
723 struct usb_device *usbdev = NULL;
724 struct usb_host_interface *iface_desc = NULL;
725 struct usb_endpoint_descriptor *rx_endpoint = NULL;
726 struct usb_endpoint_descriptor *tx_endpoint = NULL;
727 struct urb *rx_urb = NULL;
728 struct urb *tx_urb = NULL;
729 struct lirc_driver *driver = NULL;
730 struct lirc_buffer *rbuf = NULL;
731 struct device *dev = &interface->dev;
736 int display_ep_found = 0;
738 int alloc_status = 0;
739 int vfd_proto_6p = 0;
740 struct imon_context *context = NULL;
744 /* prevent races probing devices w/multiple interfaces */
745 mutex_lock(&driver_lock);
747 context = kzalloc(sizeof(struct imon_context), GFP_KERNEL);
749 dev_err(dev, "%s: kzalloc failed for context\n", __func__);
751 goto alloc_status_switch;
755 * Try to auto-detect the type of display if the user hasn't set
756 * it by hand via the display_type modparam. Default is VFD.
758 if (usb_match_id(interface, ir_only_list))
759 context->display = 0;
761 context->display = 1;
763 usbdev = usb_get_dev(interface_to_usbdev(interface));
764 iface_desc = interface->cur_altsetting;
765 num_endpts = iface_desc->desc.bNumEndpoints;
766 ifnum = iface_desc->desc.bInterfaceNumber;
767 vendor = le16_to_cpu(usbdev->descriptor.idVendor);
768 product = le16_to_cpu(usbdev->descriptor.idProduct);
770 dev_dbg(dev, "%s: found iMON device (%04x:%04x, intf%d)\n",
771 __func__, vendor, product, ifnum);
774 * Scan the endpoint list and set:
775 * first input endpoint = IR endpoint
776 * first output endpoint = display endpoint
778 for (i = 0; i < num_endpts && !(ir_ep_found && display_ep_found); ++i) {
779 struct usb_endpoint_descriptor *ep;
782 ep = &iface_desc->endpoint[i].desc;
783 ep_dir = ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK;
784 ep_type = ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
787 ep_dir == USB_DIR_IN &&
788 ep_type == USB_ENDPOINT_XFER_INT) {
792 dev_dbg(dev, "%s: found IR endpoint\n", __func__);
794 } else if (!display_ep_found && ep_dir == USB_DIR_OUT &&
795 ep_type == USB_ENDPOINT_XFER_INT) {
797 display_ep_found = 1;
798 dev_dbg(dev, "%s: found display endpoint\n", __func__);
803 * Some iMON receivers have no display. Unfortunately, it seems
804 * that SoundGraph recycles device IDs between devices both with
807 if (context->display == 0) {
808 display_ep_found = 0;
809 dev_dbg(dev, "%s: device has no display\n", __func__);
812 /* Input endpoint is mandatory */
814 dev_err(dev, "%s: no valid input (IR) endpoint found.\n", __func__);
817 goto alloc_status_switch;
820 /* Determine if display requires 6 packets */
821 if (display_ep_found) {
822 if (usb_match_id(interface, vfd_proto_6p_list))
825 dev_dbg(dev, "%s: vfd_proto_6p: %d\n",
826 __func__, vfd_proto_6p);
829 driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
831 dev_err(dev, "%s: kzalloc failed for lirc_driver\n", __func__);
833 goto alloc_status_switch;
835 rbuf = kmalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
837 dev_err(dev, "%s: kmalloc failed for lirc_buffer\n", __func__);
839 goto alloc_status_switch;
841 if (lirc_buffer_init(rbuf, BUF_CHUNK_SIZE, BUF_SIZE)) {
842 dev_err(dev, "%s: lirc_buffer_init failed\n", __func__);
844 goto alloc_status_switch;
846 rx_urb = usb_alloc_urb(0, GFP_KERNEL);
848 dev_err(dev, "%s: usb_alloc_urb failed for IR urb\n", __func__);
850 goto alloc_status_switch;
852 tx_urb = usb_alloc_urb(0, GFP_KERNEL);
854 dev_err(dev, "%s: usb_alloc_urb failed for display urb\n",
857 goto alloc_status_switch;
860 mutex_init(&context->ctx_lock);
861 context->vfd_proto_6p = vfd_proto_6p;
863 strcpy(driver->name, MOD_NAME);
865 driver->code_length = BUF_CHUNK_SIZE * 8;
866 driver->sample_rate = 0;
867 driver->features = LIRC_CAN_REC_MODE2;
868 driver->data = context;
870 driver->set_use_inc = ir_open;
871 driver->set_use_dec = ir_close;
872 driver->dev = &interface->dev;
873 driver->owner = THIS_MODULE;
875 mutex_lock(&context->ctx_lock);
877 context->driver = driver;
878 /* start out in keyboard mode */
880 lirc_minor = lirc_register_driver(driver);
881 if (lirc_minor < 0) {
882 dev_err(dev, "%s: lirc_register_driver failed\n", __func__);
886 dev_info(dev, "Registered iMON driver "
887 "(lirc minor: %d)\n", lirc_minor);
889 /* Needed while unregistering! */
890 driver->minor = lirc_minor;
892 context->usbdev = usbdev;
893 context->dev_present = 1;
894 context->rx_endpoint = rx_endpoint;
895 context->rx_urb = rx_urb;
898 * tx is used to send characters to lcd/vfd, associate RF
899 * remotes, set IR protocol, and maybe more...
901 context->tx_endpoint = tx_endpoint;
902 context->tx_urb = tx_urb;
904 if (display_ep_found)
905 context->display = 1;
907 usb_fill_int_urb(context->rx_urb, context->usbdev,
908 usb_rcvintpipe(context->usbdev,
909 context->rx_endpoint->bEndpointAddress),
910 context->usb_rx_buf, sizeof(context->usb_rx_buf),
911 usb_rx_callback, context,
912 context->rx_endpoint->bInterval);
914 retval = usb_submit_urb(context->rx_urb, GFP_KERNEL);
917 dev_err(dev, "%s: usb_submit_urb failed for intf0 (%d)\n",
919 mutex_unlock(&context->ctx_lock);
923 usb_set_intfdata(interface, context);
925 if (context->display && ifnum == 0) {
926 dev_dbg(dev, "%s: Registering iMON display with sysfs\n",
929 if (usb_register_dev(interface, &imon_class)) {
930 /* Not a fatal error, so ignore */
931 dev_info(dev, "%s: could not get a minor number for "
932 "display\n", __func__);
936 dev_info(dev, "iMON device (%04x:%04x, intf%d) on "
937 "usb<%d:%d> initialized\n", vendor, product, ifnum,
938 usbdev->bus->busnum, usbdev->devnum);
941 mutex_unlock(&context->ctx_lock);
944 switch (alloc_status) {
946 usb_free_urb(tx_urb);
948 usb_free_urb(rx_urb);
951 lirc_buffer_free(rbuf);
960 if (retval != -ENODEV)
968 mutex_unlock(&driver_lock);
974 * Callback function for USB core API: disconnect
976 static void imon_disconnect(struct usb_interface *interface)
978 struct imon_context *context;
981 /* prevent races with ir_open()/display_open() */
982 mutex_lock(&driver_lock);
984 context = usb_get_intfdata(interface);
985 ifnum = interface->cur_altsetting->desc.bInterfaceNumber;
987 mutex_lock(&context->ctx_lock);
989 usb_set_intfdata(interface, NULL);
991 /* Abort ongoing write */
992 if (atomic_read(&context->tx.busy)) {
993 usb_kill_urb(context->tx_urb);
994 complete_all(&context->tx.finished);
997 context->dev_present = 0;
998 usb_kill_urb(context->rx_urb);
999 if (context->display)
1000 usb_deregister_dev(interface, &imon_class);
1002 if (!context->ir_isopen && !context->dev_present) {
1003 deregister_from_lirc(context);
1004 mutex_unlock(&context->ctx_lock);
1005 if (!context->display_isopen)
1006 free_imon_context(context);
1008 mutex_unlock(&context->ctx_lock);
1010 mutex_unlock(&driver_lock);
1012 printk(KERN_INFO "%s: iMON device (intf%d) disconnected\n",
1016 static int imon_suspend(struct usb_interface *intf, pm_message_t message)
1018 struct imon_context *context = usb_get_intfdata(intf);
1020 usb_kill_urb(context->rx_urb);
1025 static int imon_resume(struct usb_interface *intf)
1028 struct imon_context *context = usb_get_intfdata(intf);
1030 usb_fill_int_urb(context->rx_urb, context->usbdev,
1031 usb_rcvintpipe(context->usbdev,
1032 context->rx_endpoint->bEndpointAddress),
1033 context->usb_rx_buf, sizeof(context->usb_rx_buf),
1034 usb_rx_callback, context,
1035 context->rx_endpoint->bInterval);
1037 rc = usb_submit_urb(context->rx_urb, GFP_ATOMIC);
1042 module_usb_driver(imon_driver);