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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25 #include <linux/errno.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
30 #include <linux/uaccess.h>
31 #include <linux/usb.h>
33 #include <media/lirc.h>
34 #include <media/lirc_dev.h>
37 #define MOD_AUTHOR "Venky Raju <dev@venky.ws>"
38 #define MOD_DESC "Driver for SoundGraph iMON MultiMedia IR/Display"
39 #define MOD_NAME "lirc_imon"
40 #define MOD_VERSION "0.8"
42 #define DISPLAY_MINOR_BASE 144
43 #define DEVICE_NAME "lcd%d"
45 #define BUF_CHUNK_SIZE 4
48 #define BIT_DURATION 250 /* each bit received is 250us */
50 /*** P R O T O T Y P E S ***/
52 /* USB Callback prototypes */
53 static int imon_probe(struct usb_interface
*interface
,
54 const struct usb_device_id
*id
);
55 static void imon_disconnect(struct usb_interface
*interface
);
56 static void usb_rx_callback(struct urb
*urb
);
57 static void usb_tx_callback(struct urb
*urb
);
59 /* suspend/resume support */
60 static int imon_resume(struct usb_interface
*intf
);
61 static int imon_suspend(struct usb_interface
*intf
, pm_message_t message
);
63 /* Display file_operations function prototypes */
64 static int display_open(struct inode
*inode
, struct file
*file
);
65 static int display_close(struct inode
*inode
, struct file
*file
);
67 /* VFD write operation */
68 static ssize_t
vfd_write(struct file
*file
, const char __user
*buf
,
69 size_t n_bytes
, loff_t
*pos
);
71 /* LIRC driver function prototypes */
72 static int ir_open(void *data
);
73 static void ir_close(void *data
);
75 /*** G L O B A L S ***/
76 #define IMON_DATA_BUF_SZ 35
79 struct usb_device
*usbdev
;
80 /* Newer devices have two interfaces */
81 int display
; /* not all controllers do */
82 int display_isopen
; /* display port has been opened */
83 int ir_isopen
; /* IR port open */
84 int dev_present
; /* USB device presence */
85 struct mutex ctx_lock
; /* to lock this object */
86 wait_queue_head_t remove_ok
; /* For unexpected USB disconnects */
88 int vfd_proto_6p
; /* some VFD require a 6th packet */
90 struct lirc_driver
*driver
;
91 struct usb_endpoint_descriptor
*rx_endpoint
;
92 struct usb_endpoint_descriptor
*tx_endpoint
;
95 unsigned char usb_rx_buf
[8];
96 unsigned char usb_tx_buf
[8];
99 int count
; /* length of 0 or 1 sequence */
100 int prev_bit
; /* logic level of sequence */
101 int initial_space
; /* initial space flag */
105 unsigned char data_buf
[IMON_DATA_BUF_SZ
]; /* user data buffer */
106 struct completion finished
; /* wait for write to finish */
107 atomic_t busy
; /* write in progress */
108 int status
; /* status of tx completion */
112 static const struct file_operations display_fops
= {
113 .owner
= THIS_MODULE
,
114 .open
= &display_open
,
116 .release
= &display_close
,
117 .llseek
= noop_llseek
,
121 * USB Device ID for iMON USB Control Boards
123 * The Windows drivers contain 6 different inf files, more or less one for
124 * each new device until the 0x0034-0x0046 devices, which all use the same
125 * driver. Some of the devices in the 34-46 range haven't been definitively
126 * identified yet. Early devices have either a TriGem Computer, Inc. or a
127 * Samsung vendor ID (0x0aa8 and 0x04e8 respectively), while all later
128 * devices use the SoundGraph vendor ID (0x15c2).
130 static struct usb_device_id imon_usb_id_table
[] = {
131 /* TriGem iMON (IR only) -- TG_iMON.inf */
132 { USB_DEVICE(0x0aa8, 0x8001) },
134 /* SoundGraph iMON (IR only) -- sg_imon.inf */
135 { USB_DEVICE(0x04e8, 0xff30) },
137 /* SoundGraph iMON VFD (IR & VFD) -- iMON_VFD.inf */
138 { USB_DEVICE(0x0aa8, 0xffda) },
140 /* SoundGraph iMON SS (IR & VFD) -- iMON_SS.inf */
141 { USB_DEVICE(0x15c2, 0xffda) },
146 /* Some iMON VFD models requires a 6th packet for VFD writes */
147 static struct usb_device_id vfd_proto_6p_list
[] = {
148 { USB_DEVICE(0x15c2, 0xffda) },
152 /* Some iMON devices have no lcd/vfd, don't set one up */
153 static struct usb_device_id ir_only_list
[] = {
154 { USB_DEVICE(0x0aa8, 0x8001) },
155 { USB_DEVICE(0x04e8, 0xff30) },
159 /* USB Device data */
160 static struct usb_driver imon_driver
= {
163 .disconnect
= imon_disconnect
,
164 .suspend
= imon_suspend
,
165 .resume
= imon_resume
,
166 .id_table
= imon_usb_id_table
,
169 static struct usb_class_driver imon_class
= {
171 .fops
= &display_fops
,
172 .minor_base
= DISPLAY_MINOR_BASE
,
175 /* to prevent races between open() and disconnect(), probing, etc */
176 static DEFINE_MUTEX(driver_lock
);
180 /*** M O D U L E C O D E ***/
182 MODULE_AUTHOR(MOD_AUTHOR
);
183 MODULE_DESCRIPTION(MOD_DESC
);
184 MODULE_VERSION(MOD_VERSION
);
185 MODULE_LICENSE("GPL");
186 MODULE_DEVICE_TABLE(usb
, imon_usb_id_table
);
187 module_param(debug
, int, S_IRUGO
| S_IWUSR
);
188 MODULE_PARM_DESC(debug
, "Debug messages: 0=no, 1=yes(default: no)");
190 static void free_imon_context(struct imon_context
*context
)
192 struct device
*dev
= context
->driver
->dev
;
193 usb_free_urb(context
->tx_urb
);
194 usb_free_urb(context
->rx_urb
);
195 lirc_buffer_free(context
->driver
->rbuf
);
196 kfree(context
->driver
->rbuf
);
197 kfree(context
->driver
);
200 dev_dbg(dev
, "%s: iMON context freed\n", __func__
);
203 static void deregister_from_lirc(struct imon_context
*context
)
206 int minor
= context
->driver
->minor
;
208 retval
= lirc_unregister_driver(minor
);
210 dev_err(&context
->usbdev
->dev
,
211 ": %s: unable to deregister from lirc(%d)",
214 dev_info(&context
->usbdev
->dev
,
215 "Deregistered iMON driver (minor:%d)\n", minor
);
220 * Called when the Display device (e.g. /dev/lcd0)
221 * is opened by the application.
223 static int display_open(struct inode
*inode
, struct file
*file
)
225 struct usb_interface
*interface
;
226 struct imon_context
*context
= NULL
;
230 /* prevent races with disconnect */
231 mutex_lock(&driver_lock
);
233 subminor
= iminor(inode
);
234 interface
= usb_find_interface(&imon_driver
, subminor
);
236 pr_err("%s: could not find interface for minor %d\n",
241 context
= usb_get_intfdata(interface
);
244 dev_err(&interface
->dev
,
245 "%s: no context found for minor %d\n",
251 mutex_lock(&context
->ctx_lock
);
253 if (!context
->display
) {
254 dev_err(&interface
->dev
,
255 "%s: display not supported by device\n", __func__
);
257 } else if (context
->display_isopen
) {
258 dev_err(&interface
->dev
,
259 "%s: display port is already open\n", __func__
);
262 context
->display_isopen
= 1;
263 file
->private_data
= context
;
264 dev_info(context
->driver
->dev
, "display port opened\n");
267 mutex_unlock(&context
->ctx_lock
);
270 mutex_unlock(&driver_lock
);
275 * Called when the display device (e.g. /dev/lcd0)
276 * is closed by the application.
278 static int display_close(struct inode
*inode
, struct file
*file
)
280 struct imon_context
*context
= NULL
;
283 context
= file
->private_data
;
286 pr_err("%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 pr_err("%s: no context for device\n", __func__
);
398 mutex_lock(&context
->ctx_lock
);
400 if (!context
->dev_present
) {
401 dev_err(&context
->usbdev
->dev
,
402 "%s: no iMON device present\n", __func__
);
407 if (n_bytes
<= 0 || n_bytes
> IMON_DATA_BUF_SZ
- 3) {
408 dev_err(&context
->usbdev
->dev
,
409 "%s: invalid payload size\n", __func__
);
414 data_buf
= memdup_user(buf
, n_bytes
);
415 if (IS_ERR(data_buf
)) {
416 retval
= PTR_ERR(data_buf
);
420 memcpy(context
->tx
.data_buf
, data_buf
, n_bytes
);
422 /* Pad with spaces */
423 for (i
= n_bytes
; i
< IMON_DATA_BUF_SZ
- 3; ++i
)
424 context
->tx
.data_buf
[i
] = ' ';
426 for (i
= IMON_DATA_BUF_SZ
- 3; i
< IMON_DATA_BUF_SZ
; ++i
)
427 context
->tx
.data_buf
[i
] = 0xFF;
433 memcpy(context
->usb_tx_buf
, context
->tx
.data_buf
+ offset
, 7);
434 context
->usb_tx_buf
[7] = (unsigned char) seq
;
436 retval
= send_packet(context
);
438 dev_err(&context
->usbdev
->dev
,
439 "%s: send packet failed for packet #%d\n",
447 } while (offset
< IMON_DATA_BUF_SZ
);
449 if (context
->vfd_proto_6p
) {
451 memcpy(context
->usb_tx_buf
, &vfd_packet6
, sizeof(vfd_packet6
));
452 context
->usb_tx_buf
[7] = (unsigned char) seq
;
453 retval
= send_packet(context
);
455 dev_err(&context
->usbdev
->dev
,
456 "%s: send packet failed for packet #%d\n",
461 mutex_unlock(&context
->ctx_lock
);
464 return (!retval
) ? n_bytes
: retval
;
468 * Callback function for USB core API: transmit data
470 static void usb_tx_callback(struct urb
*urb
)
472 struct imon_context
*context
;
476 context
= (struct imon_context
*)urb
->context
;
480 context
->tx
.status
= urb
->status
;
482 /* notify waiters that write has finished */
483 atomic_set(&context
->tx
.busy
, 0);
484 complete(&context
->tx
.finished
);
490 * Called by lirc_dev when the application opens /dev/lirc
492 static int ir_open(void *data
)
495 struct imon_context
*context
;
497 /* prevent races with disconnect */
498 mutex_lock(&driver_lock
);
500 context
= (struct imon_context
*)data
;
502 /* initial IR protocol decode variables */
503 context
->rx
.count
= 0;
504 context
->rx
.initial_space
= 1;
505 context
->rx
.prev_bit
= 0;
507 context
->ir_isopen
= 1;
508 dev_info(context
->driver
->dev
, "IR port opened\n");
510 mutex_unlock(&driver_lock
);
515 * Called by lirc_dev when the application closes /dev/lirc
517 static void ir_close(void *data
)
519 struct imon_context
*context
;
521 context
= (struct imon_context
*)data
;
523 pr_err("%s: no context for device\n", __func__
);
527 mutex_lock(&context
->ctx_lock
);
529 context
->ir_isopen
= 0;
530 dev_info(context
->driver
->dev
, "IR port closed\n");
532 if (!context
->dev_present
) {
534 * Device disconnected while IR port was still open. Driver
535 * was not deregistered at disconnect time, so do it now.
537 deregister_from_lirc(context
);
539 if (!context
->display_isopen
) {
540 mutex_unlock(&context
->ctx_lock
);
541 free_imon_context(context
);
545 * If display port is open, context will be deleted by
550 mutex_unlock(&context
->ctx_lock
);
555 * Convert bit count to time duration (in us) and submit
556 * the value to lirc_dev.
558 static void submit_data(struct imon_context
*context
)
560 unsigned char buf
[4];
561 int value
= context
->rx
.count
;
564 dev_dbg(context
->driver
->dev
, "submitting data to LIRC\n");
566 value
*= BIT_DURATION
;
568 if (context
->rx
.prev_bit
)
571 for (i
= 0; i
< 4; ++i
)
572 buf
[i
] = value
>>(i
*8);
574 lirc_buffer_write(context
->driver
->rbuf
, buf
);
575 wake_up(&context
->driver
->rbuf
->wait_poll
);
579 static inline int tv2int(const struct timeval
*a
, const struct timeval
*b
)
584 if (b
->tv_usec
> a
->tv_usec
) {
589 usecs
+= a
->tv_usec
- b
->tv_usec
;
591 sec
+= a
->tv_sec
- b
->tv_sec
;
603 * Process the incoming packet
605 static void imon_incoming_packet(struct imon_context
*context
,
606 struct urb
*urb
, int intf
)
608 int len
= urb
->actual_length
;
609 unsigned char *buf
= urb
->transfer_buffer
;
610 struct device
*dev
= context
->driver
->dev
;
616 * just bail out if no listening IR client
618 if (!context
->ir_isopen
)
622 dev_warn(dev
, "imon %s: invalid incoming packet "
623 "size (len = %d, intf%d)\n", __func__
, len
, intf
);
628 dev_info(dev
, "raw packet: ");
629 for (i
= 0; i
< len
; ++i
)
630 printk("%02x ", buf
[i
]);
635 * Translate received data to pulse and space lengths.
636 * Received data is active low, i.e. pulses are 0 and
639 * My original algorithm was essentially similar to
640 * Changwoo Ryu's with the exception that he switched
641 * the incoming bits to active high and also fed an
642 * initial space to LIRC at the start of a new sequence
643 * if the previous bit was a pulse.
645 * I've decided to adopt his algorithm.
648 if (buf
[7] == 1 && context
->rx
.initial_space
) {
649 /* LIRC requires a leading space */
650 context
->rx
.prev_bit
= 0;
651 context
->rx
.count
= 4;
652 submit_data(context
);
653 context
->rx
.count
= 0;
656 for (octet
= 0; octet
< 5; ++octet
) {
658 for (bit
= 0; bit
< 8; ++bit
) {
659 int curr_bit
= !(buf
[octet
] & mask
);
660 if (curr_bit
!= context
->rx
.prev_bit
) {
661 if (context
->rx
.count
) {
662 submit_data(context
);
663 context
->rx
.count
= 0;
665 context
->rx
.prev_bit
= curr_bit
;
673 if (context
->rx
.count
) {
674 submit_data(context
);
675 context
->rx
.count
= 0;
677 context
->rx
.initial_space
= context
->rx
.prev_bit
;
682 * Callback function for USB core API: receive data
684 static void usb_rx_callback(struct urb
*urb
)
686 struct imon_context
*context
;
692 context
= (struct imon_context
*)urb
->context
;
696 switch (urb
->status
) {
697 case -ENOENT
: /* usbcore unlink successful! */
701 imon_incoming_packet(context
, urb
, intfnum
);
705 dev_warn(context
->driver
->dev
, "imon %s: status(%d): ignored\n",
706 __func__
, urb
->status
);
710 usb_submit_urb(context
->rx_urb
, GFP_ATOMIC
);
716 * Callback function for USB core API: Probe
718 static int imon_probe(struct usb_interface
*interface
,
719 const struct usb_device_id
*id
)
721 struct usb_device
*usbdev
= NULL
;
722 struct usb_host_interface
*iface_desc
= NULL
;
723 struct usb_endpoint_descriptor
*rx_endpoint
= NULL
;
724 struct usb_endpoint_descriptor
*tx_endpoint
= NULL
;
725 struct urb
*rx_urb
= NULL
;
726 struct urb
*tx_urb
= NULL
;
727 struct lirc_driver
*driver
= NULL
;
728 struct lirc_buffer
*rbuf
= NULL
;
729 struct device
*dev
= &interface
->dev
;
734 int display_ep_found
= 0;
736 int alloc_status
= 0;
737 int vfd_proto_6p
= 0;
738 struct imon_context
*context
= NULL
;
742 /* prevent races probing devices w/multiple interfaces */
743 mutex_lock(&driver_lock
);
745 context
= kzalloc(sizeof(struct imon_context
), GFP_KERNEL
);
748 goto alloc_status_switch
;
752 * Try to auto-detect the type of display if the user hasn't set
753 * it by hand via the display_type modparam. Default is VFD.
755 if (usb_match_id(interface
, ir_only_list
))
756 context
->display
= 0;
758 context
->display
= 1;
760 usbdev
= usb_get_dev(interface_to_usbdev(interface
));
761 iface_desc
= interface
->cur_altsetting
;
762 num_endpts
= iface_desc
->desc
.bNumEndpoints
;
763 ifnum
= iface_desc
->desc
.bInterfaceNumber
;
764 vendor
= le16_to_cpu(usbdev
->descriptor
.idVendor
);
765 product
= le16_to_cpu(usbdev
->descriptor
.idProduct
);
767 dev_dbg(dev
, "%s: found iMON device (%04x:%04x, intf%d)\n",
768 __func__
, vendor
, product
, ifnum
);
771 * Scan the endpoint list and set:
772 * first input endpoint = IR endpoint
773 * first output endpoint = display endpoint
775 for (i
= 0; i
< num_endpts
&& !(ir_ep_found
&& display_ep_found
); ++i
) {
776 struct usb_endpoint_descriptor
*ep
;
779 ep
= &iface_desc
->endpoint
[i
].desc
;
780 ep_dir
= ep
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
;
781 ep_type
= ep
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
;
784 ep_dir
== USB_DIR_IN
&&
785 ep_type
== USB_ENDPOINT_XFER_INT
) {
789 dev_dbg(dev
, "%s: found IR endpoint\n", __func__
);
791 } else if (!display_ep_found
&& ep_dir
== USB_DIR_OUT
&&
792 ep_type
== USB_ENDPOINT_XFER_INT
) {
794 display_ep_found
= 1;
795 dev_dbg(dev
, "%s: found display endpoint\n", __func__
);
800 * Some iMON receivers have no display. Unfortunately, it seems
801 * that SoundGraph recycles device IDs between devices both with
804 if (context
->display
== 0) {
805 display_ep_found
= 0;
806 dev_dbg(dev
, "%s: device has no display\n", __func__
);
809 /* Input endpoint is mandatory */
811 dev_err(dev
, "%s: no valid input (IR) endpoint found.\n",
815 goto alloc_status_switch
;
818 /* Determine if display requires 6 packets */
819 if (display_ep_found
) {
820 if (usb_match_id(interface
, vfd_proto_6p_list
))
823 dev_dbg(dev
, "%s: vfd_proto_6p: %d\n",
824 __func__
, vfd_proto_6p
);
827 driver
= kzalloc(sizeof(struct lirc_driver
), GFP_KERNEL
);
830 goto alloc_status_switch
;
832 rbuf
= kmalloc(sizeof(struct lirc_buffer
), GFP_KERNEL
);
835 goto alloc_status_switch
;
837 if (lirc_buffer_init(rbuf
, BUF_CHUNK_SIZE
, BUF_SIZE
)) {
838 dev_err(dev
, "%s: lirc_buffer_init failed\n", __func__
);
840 goto alloc_status_switch
;
842 rx_urb
= usb_alloc_urb(0, GFP_KERNEL
);
844 dev_err(dev
, "%s: usb_alloc_urb failed for IR urb\n", __func__
);
846 goto alloc_status_switch
;
848 tx_urb
= usb_alloc_urb(0, GFP_KERNEL
);
850 dev_err(dev
, "%s: usb_alloc_urb failed for display urb\n",
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
= BUF_CHUNK_SIZE
* 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 dev_err(dev
, "%s: lirc_register_driver failed\n", __func__
);
882 dev_info(dev
, "Registered iMON driver (lirc minor: %d)\n",
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 dev_err(dev
, "%s: usb_submit_urb failed for intf0 (%d)\n",
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 display\n",
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
);
940 switch (alloc_status
) {
942 lirc_unregister_driver(driver
->minor
);
944 usb_free_urb(tx_urb
);
946 usb_free_urb(rx_urb
);
949 lirc_buffer_free(rbuf
);
958 if (retval
!= -ENODEV
)
965 mutex_unlock(&driver_lock
);
971 * Callback function for USB core API: disconnect
973 static void imon_disconnect(struct usb_interface
*interface
)
975 struct imon_context
*context
;
978 /* prevent races with ir_open()/display_open() */
979 mutex_lock(&driver_lock
);
981 context
= usb_get_intfdata(interface
);
982 ifnum
= interface
->cur_altsetting
->desc
.bInterfaceNumber
;
984 mutex_lock(&context
->ctx_lock
);
986 usb_set_intfdata(interface
, NULL
);
988 /* Abort ongoing write */
989 if (atomic_read(&context
->tx
.busy
)) {
990 usb_kill_urb(context
->tx_urb
);
991 complete_all(&context
->tx
.finished
);
994 context
->dev_present
= 0;
995 usb_kill_urb(context
->rx_urb
);
996 if (context
->display
)
997 usb_deregister_dev(interface
, &imon_class
);
999 if (!context
->ir_isopen
&& !context
->dev_present
) {
1000 deregister_from_lirc(context
);
1001 mutex_unlock(&context
->ctx_lock
);
1002 if (!context
->display_isopen
)
1003 free_imon_context(context
);
1005 mutex_unlock(&context
->ctx_lock
);
1007 mutex_unlock(&driver_lock
);
1009 dev_info(&interface
->dev
, "%s: iMON device (intf%d) disconnected\n",
1013 static int imon_suspend(struct usb_interface
*intf
, pm_message_t message
)
1015 struct imon_context
*context
= usb_get_intfdata(intf
);
1017 usb_kill_urb(context
->rx_urb
);
1022 static int imon_resume(struct usb_interface
*intf
)
1025 struct imon_context
*context
= usb_get_intfdata(intf
);
1027 usb_fill_int_urb(context
->rx_urb
, context
->usbdev
,
1028 usb_rcvintpipe(context
->usbdev
,
1029 context
->rx_endpoint
->bEndpointAddress
),
1030 context
->usb_rx_buf
, sizeof(context
->usb_rx_buf
),
1031 usb_rx_callback
, context
,
1032 context
->rx_endpoint
->bInterval
);
1034 rc
= usb_submit_urb(context
->rx_urb
, GFP_ATOMIC
);
1039 module_usb_driver(imon_driver
);