2 * Streamzap Remote Control driver
4 * Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de>
5 * Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com>
7 * This driver was based on the work of Greg Wickham and Adrian
8 * Dewhurst. It was substantially rewritten to support correct signal
9 * gaps and now maintains a delay buffer, which is used to present
10 * consistent timing behaviour to user space applications. Without the
11 * delay buffer an ugly hack would be required in lircd, which can
12 * cause sluggish signal decoding in certain situations.
14 * Ported to in-kernel ir-core interface by Jarod Wilson
16 * This driver is based on the USB skeleton driver packaged with the
17 * kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com)
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation; either version 2 of the License, or
22 * (at your option) any later version.
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
34 #include <linux/device.h>
35 #include <linux/module.h>
36 #include <linux/slab.h>
37 #include <linux/usb.h>
38 #include <linux/input.h>
39 #include <media/ir-core.h>
41 #define DRIVER_VERSION "1.61"
42 #define DRIVER_NAME "streamzap"
43 #define DRIVER_DESC "Streamzap Remote Control driver"
45 #ifdef CONFIG_USB_DEBUG
51 #define USB_STREAMZAP_VENDOR_ID 0x0e9c
52 #define USB_STREAMZAP_PRODUCT_ID 0x0000
54 /* table of devices that work with this driver */
55 static struct usb_device_id streamzap_table
[] = {
56 /* Streamzap Remote Control */
57 { USB_DEVICE(USB_STREAMZAP_VENDOR_ID
, USB_STREAMZAP_PRODUCT_ID
) },
58 /* Terminating entry */
62 MODULE_DEVICE_TABLE(usb
, streamzap_table
);
64 #define SZ_PULSE_MASK 0xf0
65 #define SZ_SPACE_MASK 0x0f
66 #define SZ_TIMEOUT 0xff
67 #define SZ_RESOLUTION 256
69 /* number of samples buffered */
70 #define SZ_BUF_LEN 128
72 /* from ir-rc5-sz-decoder.c */
73 #ifdef CONFIG_IR_RC5_SZ_DECODER_MODULE
74 #define load_rc5_sz_decode() request_module("ir-rc5-sz-decoder")
76 #define load_rc5_sz_decode() 0
79 enum StreamzapDecoderState
{
86 /* structure to hold our device specific stuff */
90 struct ir_dev_props
*props
;
92 /* core device info */
94 struct input_dev
*idev
;
97 struct usb_device
*usbdev
;
98 struct usb_interface
*interface
;
99 struct usb_endpoint_descriptor
*endpoint
;
103 unsigned char *buf_in
;
105 unsigned int buf_in_len
;
107 /* track what state we're in */
108 enum StreamzapDecoderState decoder_state
;
109 /* tracks whether we are currently receiving some signal */
111 /* sum of signal lengths received since signal start */
113 /* start time of signal; necessary for gap tracking */
114 struct timeval signal_last
;
115 struct timeval signal_start
;
116 bool timeout_enabled
;
123 /* local function prototypes */
124 static int streamzap_probe(struct usb_interface
*interface
,
125 const struct usb_device_id
*id
);
126 static void streamzap_disconnect(struct usb_interface
*interface
);
127 static void streamzap_callback(struct urb
*urb
);
128 static int streamzap_suspend(struct usb_interface
*intf
, pm_message_t message
);
129 static int streamzap_resume(struct usb_interface
*intf
);
131 /* usb specific object needed to register this driver with the usb subsystem */
132 static struct usb_driver streamzap_driver
= {
134 .probe
= streamzap_probe
,
135 .disconnect
= streamzap_disconnect
,
136 .suspend
= streamzap_suspend
,
137 .resume
= streamzap_resume
,
138 .id_table
= streamzap_table
,
141 static void sz_push(struct streamzap_ir
*sz
, struct ir_raw_event rawir
)
143 ir_raw_event_store(sz
->idev
, &rawir
);
146 static void sz_push_full_pulse(struct streamzap_ir
*sz
,
149 struct ir_raw_event rawir
;
154 sz
->signal_last
= sz
->signal_start
;
155 do_gettimeofday(&sz
->signal_start
);
157 deltv
= sz
->signal_start
.tv_sec
- sz
->signal_last
.tv_sec
;
160 /* really long time */
161 rawir
.duration
= IR_MAX_DURATION
;
163 rawir
.duration
= (int)(deltv
* 1000000 +
164 sz
->signal_start
.tv_usec
-
165 sz
->signal_last
.tv_usec
);
166 rawir
.duration
-= sz
->sum
;
167 rawir
.duration
*= 1000;
168 rawir
.duration
&= IR_MAX_DURATION
;
170 dev_dbg(sz
->dev
, "ls %u\n", rawir
.duration
);
178 rawir
.duration
= ((int) value
) * SZ_RESOLUTION
;
179 rawir
.duration
+= SZ_RESOLUTION
/ 2;
180 sz
->sum
+= rawir
.duration
;
181 rawir
.duration
*= 1000;
182 rawir
.duration
&= IR_MAX_DURATION
;
183 dev_dbg(sz
->dev
, "p %u\n", rawir
.duration
);
187 static void sz_push_half_pulse(struct streamzap_ir
*sz
,
190 sz_push_full_pulse(sz
, (value
& SZ_PULSE_MASK
) >> 4);
193 static void sz_push_full_space(struct streamzap_ir
*sz
,
196 struct ir_raw_event rawir
;
199 rawir
.duration
= ((int) value
) * SZ_RESOLUTION
;
200 rawir
.duration
+= SZ_RESOLUTION
/ 2;
201 sz
->sum
+= rawir
.duration
;
202 rawir
.duration
*= 1000;
203 dev_dbg(sz
->dev
, "s %u\n", rawir
.duration
);
207 static void sz_push_half_space(struct streamzap_ir
*sz
,
210 sz_push_full_space(sz
, value
& SZ_SPACE_MASK
);
214 * streamzap_callback - usb IRQ handler callback
216 * This procedure is invoked on reception of data from
219 static void streamzap_callback(struct urb
*urb
)
221 struct streamzap_ir
*sz
;
224 static int timeout
= (((SZ_TIMEOUT
* SZ_RESOLUTION
) &
225 IR_MAX_DURATION
) | 0x03000000);
231 len
= urb
->actual_length
;
233 switch (urb
->status
) {
238 * this urb is terminated, clean up.
239 * sz might already be invalid at this point
241 dev_err(sz
->dev
, "urb terminated, status: %d\n", urb
->status
);
247 dev_dbg(sz
->dev
, "%s: received urb, len %d\n", __func__
, len
);
248 for (i
= 0; i
< len
; i
++) {
249 dev_dbg(sz
->dev
, "sz idx %d: %x\n",
250 i
, (unsigned char)sz
->buf_in
[i
]);
251 switch (sz
->decoder_state
) {
253 if ((sz
->buf_in
[i
] & SZ_PULSE_MASK
) ==
255 sz
->decoder_state
= FullPulse
;
257 } else if ((sz
->buf_in
[i
] & SZ_SPACE_MASK
)
259 sz_push_half_pulse(sz
, sz
->buf_in
[i
]);
260 sz
->decoder_state
= FullSpace
;
263 sz_push_half_pulse(sz
, sz
->buf_in
[i
]);
264 sz_push_half_space(sz
, sz
->buf_in
[i
]);
268 sz_push_full_pulse(sz
, sz
->buf_in
[i
]);
269 sz
->decoder_state
= IgnorePulse
;
272 if (sz
->buf_in
[i
] == SZ_TIMEOUT
) {
273 struct ir_raw_event rawir
;
276 rawir
.duration
= timeout
* 1000;
278 if (sz
->timeout_enabled
)
280 ir_raw_event_handle(sz
->idev
);
282 sz_push_full_space(sz
, sz
->buf_in
[i
]);
284 sz
->decoder_state
= PulseSpace
;
287 if ((sz
->buf_in
[i
] & SZ_SPACE_MASK
) ==
289 sz
->decoder_state
= FullSpace
;
292 sz_push_half_space(sz
, sz
->buf_in
[i
]);
293 sz
->decoder_state
= PulseSpace
;
298 usb_submit_urb(urb
, GFP_ATOMIC
);
303 static struct input_dev
*streamzap_init_input_dev(struct streamzap_ir
*sz
)
305 struct input_dev
*idev
;
306 struct ir_dev_props
*props
;
307 struct device
*dev
= sz
->dev
;
310 idev
= input_allocate_device();
312 dev_err(dev
, "remote input dev allocation failed\n");
313 goto idev_alloc_failed
;
316 props
= kzalloc(sizeof(struct ir_dev_props
), GFP_KERNEL
);
318 dev_err(dev
, "remote ir dev props allocation failed\n");
319 goto props_alloc_failed
;
322 snprintf(sz
->name
, sizeof(sz
->name
), "Streamzap PC Remote Infrared "
323 "Receiver (%04x:%04x)",
324 le16_to_cpu(sz
->usbdev
->descriptor
.idVendor
),
325 le16_to_cpu(sz
->usbdev
->descriptor
.idProduct
));
327 idev
->name
= sz
->name
;
328 usb_make_path(sz
->usbdev
, sz
->phys
, sizeof(sz
->phys
));
329 strlcat(sz
->phys
, "/input0", sizeof(sz
->phys
));
330 idev
->phys
= sz
->phys
;
333 props
->driver_type
= RC_DRIVER_IR_RAW
;
334 props
->allowed_protos
= IR_TYPE_ALL
;
338 ret
= ir_input_register(idev
, RC_MAP_STREAMZAP
, props
, DRIVER_NAME
);
340 dev_err(dev
, "remote input device register failed\n");
349 input_free_device(idev
);
357 * Called by usb-core to associated with a candidate device
358 * On any failure the return value is the ERROR
359 * On success return 0
361 static int __devinit
streamzap_probe(struct usb_interface
*intf
,
362 const struct usb_device_id
*id
)
364 struct usb_device
*usbdev
= interface_to_usbdev(intf
);
365 struct usb_host_interface
*iface_host
;
366 struct streamzap_ir
*sz
= NULL
;
367 char buf
[63], name
[128] = "";
368 int retval
= -ENOMEM
;
371 /* Allocate space for device driver specific data */
372 sz
= kzalloc(sizeof(struct streamzap_ir
), GFP_KERNEL
);
377 sz
->interface
= intf
;
379 /* Check to ensure endpoint information matches requirements */
380 iface_host
= intf
->cur_altsetting
;
382 if (iface_host
->desc
.bNumEndpoints
!= 1) {
383 dev_err(&intf
->dev
, "%s: Unexpected desc.bNumEndpoints (%d)\n",
384 __func__
, iface_host
->desc
.bNumEndpoints
);
389 sz
->endpoint
= &(iface_host
->endpoint
[0].desc
);
390 if ((sz
->endpoint
->bEndpointAddress
& USB_ENDPOINT_DIR_MASK
)
392 dev_err(&intf
->dev
, "%s: endpoint doesn't match input device "
393 "02%02x\n", __func__
, sz
->endpoint
->bEndpointAddress
);
398 if ((sz
->endpoint
->bmAttributes
& USB_ENDPOINT_XFERTYPE_MASK
)
399 != USB_ENDPOINT_XFER_INT
) {
400 dev_err(&intf
->dev
, "%s: endpoint attributes don't match xfer "
401 "02%02x\n", __func__
, sz
->endpoint
->bmAttributes
);
406 pipe
= usb_rcvintpipe(usbdev
, sz
->endpoint
->bEndpointAddress
);
407 maxp
= usb_maxpacket(usbdev
, pipe
, usb_pipeout(pipe
));
410 dev_err(&intf
->dev
, "%s: endpoint Max Packet Size is 0!?!\n",
416 /* Allocate the USB buffer and IRQ URB */
417 sz
->buf_in
= usb_alloc_coherent(usbdev
, maxp
, GFP_ATOMIC
, &sz
->dma_in
);
421 sz
->urb_in
= usb_alloc_urb(0, GFP_KERNEL
);
425 sz
->dev
= &intf
->dev
;
426 sz
->buf_in_len
= maxp
;
428 if (usbdev
->descriptor
.iManufacturer
429 && usb_string(usbdev
, usbdev
->descriptor
.iManufacturer
,
430 buf
, sizeof(buf
)) > 0)
431 strlcpy(name
, buf
, sizeof(name
));
433 if (usbdev
->descriptor
.iProduct
434 && usb_string(usbdev
, usbdev
->descriptor
.iProduct
,
435 buf
, sizeof(buf
)) > 0)
436 snprintf(name
+ strlen(name
), sizeof(name
) - strlen(name
),
439 sz
->idev
= streamzap_init_input_dev(sz
);
444 sz
->decoder_state
= PulseSpace
;
445 /* FIXME: don't yet have a way to set this */
446 sz
->timeout_enabled
= true;
448 /* not yet supported, depends on patches from maxim */
449 /* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */
450 sz
->min_timeout
= SZ_TIMEOUT
* SZ_RESOLUTION
* 1000;
451 sz
->max_timeout
= SZ_TIMEOUT
* SZ_RESOLUTION
* 1000;
454 do_gettimeofday(&sz
->signal_start
);
456 /* Complete final initialisations */
457 usb_fill_int_urb(sz
->urb_in
, usbdev
, pipe
, sz
->buf_in
,
458 maxp
, (usb_complete_t
)streamzap_callback
,
459 sz
, sz
->endpoint
->bInterval
);
460 sz
->urb_in
->transfer_dma
= sz
->dma_in
;
461 sz
->urb_in
->transfer_flags
|= URB_NO_TRANSFER_DMA_MAP
;
463 usb_set_intfdata(intf
, sz
);
465 if (usb_submit_urb(sz
->urb_in
, GFP_ATOMIC
))
466 dev_err(sz
->dev
, "urb submit failed\n");
468 dev_info(sz
->dev
, "Registered %s on usb%d:%d\n", name
,
469 usbdev
->bus
->busnum
, usbdev
->devnum
);
471 /* Load the streamzap not-quite-rc5 decoder too */
472 load_rc5_sz_decode();
477 usb_free_urb(sz
->urb_in
);
479 usb_free_coherent(usbdev
, maxp
, sz
->buf_in
, sz
->dma_in
);
487 * streamzap_disconnect
489 * Called by the usb core when the device is removed from the system.
491 * This routine guarantees that the driver will not submit any more urbs
492 * by clearing dev->usbdev. It is also supposed to terminate any currently
493 * active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(),
494 * does not provide any way to do this.
496 static void streamzap_disconnect(struct usb_interface
*interface
)
498 struct streamzap_ir
*sz
= usb_get_intfdata(interface
);
499 struct usb_device
*usbdev
= interface_to_usbdev(interface
);
501 usb_set_intfdata(interface
, NULL
);
507 ir_input_unregister(sz
->idev
);
508 usb_kill_urb(sz
->urb_in
);
509 usb_free_urb(sz
->urb_in
);
510 usb_free_coherent(usbdev
, sz
->buf_in_len
, sz
->buf_in
, sz
->dma_in
);
515 static int streamzap_suspend(struct usb_interface
*intf
, pm_message_t message
)
517 struct streamzap_ir
*sz
= usb_get_intfdata(intf
);
519 usb_kill_urb(sz
->urb_in
);
524 static int streamzap_resume(struct usb_interface
*intf
)
526 struct streamzap_ir
*sz
= usb_get_intfdata(intf
);
528 if (usb_submit_urb(sz
->urb_in
, GFP_ATOMIC
)) {
529 dev_err(sz
->dev
, "Error sumbiting urb\n");
539 static int __init
streamzap_init(void)
543 /* register this driver with the USB subsystem */
544 ret
= usb_register(&streamzap_driver
);
546 printk(KERN_ERR DRIVER_NAME
": usb register failed, "
547 "result = %d\n", ret
);
555 static void __exit
streamzap_exit(void)
557 usb_deregister(&streamzap_driver
);
561 module_init(streamzap_init
);
562 module_exit(streamzap_exit
);
564 MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>");
565 MODULE_DESCRIPTION(DRIVER_DESC
);
566 MODULE_LICENSE("GPL");
568 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
569 MODULE_PARM_DESC(debug
, "Enable debugging messages");