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
);