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V4L/DVB (12373): hdpvr: fix lock imbalances
[firewire-audio.git] / drivers / media / video / hdpvr / hdpvr-core.c
blob1c9bc94c905c0afb29f460c7b044fde1175cc8c6
1 /*
2 * Hauppauge HD PVR USB driver
3 *
4 * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
5 * Copyright (C) 2008 Janne Grunau (j@jannau.net)
6 * Copyright (C) 2008 John Poet
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation, version 2.
11 *
12 */
13
14 #include <linux/kernel.h>
15 #include <linux/errno.h>
16 #include <linux/init.h>
17 #include <linux/slab.h>
18 #include <linux/module.h>
19 #include <linux/uaccess.h>
20 #include <asm/atomic.h>
21 #include <linux/usb.h>
22 #include <linux/mutex.h>
23 #include <linux/i2c.h>
24
25 #include <linux/videodev2.h>
26 #include <media/v4l2-dev.h>
27 #include <media/v4l2-common.h>
28
29 #include "hdpvr.h"
30
31 static int video_nr[HDPVR_MAX] = {[0 ... (HDPVR_MAX - 1)] = UNSET};
32 module_param_array(video_nr, int, NULL, 0);
33 MODULE_PARM_DESC(video_nr, "video device number (-1=Auto)");
34
35 /* holds the number of currently registered devices */
36 static atomic_t dev_nr = ATOMIC_INIT(-1);
37
38 int hdpvr_debug;
39 module_param(hdpvr_debug, int, S_IRUGO|S_IWUSR);
40 MODULE_PARM_DESC(hdpvr_debug, "enable debugging output");
41
42 uint default_video_input = HDPVR_VIDEO_INPUTS;
43 module_param(default_video_input, uint, S_IRUGO|S_IWUSR);
44 MODULE_PARM_DESC(default_video_input, "default video input: 0=Component / "
45 "1=S-Video / 2=Composite");
46
47 uint default_audio_input = HDPVR_AUDIO_INPUTS;
48 module_param(default_audio_input, uint, S_IRUGO|S_IWUSR);
49 MODULE_PARM_DESC(default_audio_input, "default audio input: 0=RCA back / "
50 "1=RCA front / 2=S/PDIF");
51
52 static int boost_audio;
53 module_param(boost_audio, bool, S_IRUGO|S_IWUSR);
54 MODULE_PARM_DESC(boost_audio, "boost the audio signal");
55
56
57 /* table of devices that work with this driver */
58 static struct usb_device_id hdpvr_table[] = {
59 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID) },
60 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID1) },
61 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID2) },
62 { } /* Terminating entry */
63 };
64 MODULE_DEVICE_TABLE(usb, hdpvr_table);
65
66
67 void hdpvr_delete(struct hdpvr_device *dev)
68 {
69 hdpvr_free_buffers(dev);
70
71 if (dev->video_dev)
72 video_device_release(dev->video_dev);
73
74 usb_put_dev(dev->udev);
75 }
76
77 static void challenge(u8 *bytes)
78 {
79 u64 *i64P, tmp64;
80 uint i, idx;
81
82 for (idx = 0; idx < 32; ++idx) {
83
84 if (idx & 0x3)
85 bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
86
87 switch (idx & 0x3) {
88 case 0x3:
89 bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
90 bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
91 break;
92 case 0x1:
93 bytes[0] *= 8;
94 bytes[0] += 7*idx + 4;
95 bytes[6] += bytes[3] * 3;
96 break;
97 case 0x0:
98 bytes[3 - (idx >> 3)] = bytes[idx >> 2];
99 bytes[5] += bytes[6] * 3;
100 for (i = 0; i < 3; i++)
101 bytes[3] *= bytes[3] + 1;
102 break;
103 case 0x2:
104 for (i = 0; i < 3; i++)
105 bytes[1] *= bytes[6] + 1;
106 for (i = 0; i < 3; i++) {
107 i64P = (u64 *)bytes;
108 tmp64 = le64_to_cpup(i64P);
109 tmp64 <<= bytes[7] & 0x0f;
110 *i64P += cpu_to_le64(tmp64);
111 }
112 break;
113 }
114 }
115 }
116
117 /* try to init the device like the windows driver */
118 static int device_authorization(struct hdpvr_device *dev)
119 {
120
121 int ret, retval = -ENOMEM;
122 char request_type = 0x38, rcv_request = 0x81;
123 char *response;
124 #ifdef HDPVR_DEBUG
125 size_t buf_size = 46;
126 char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL);
127 if (!print_buf) {
128 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
129 return retval;
130 }
131 #endif
132
133 mutex_lock(&dev->usbc_mutex);
134 ret = usb_control_msg(dev->udev,
135 usb_rcvctrlpipe(dev->udev, 0),
136 rcv_request, 0x80 | request_type,
137 0x0400, 0x0003,
138 dev->usbc_buf, 46,
139 10000);
140 if (ret != 46) {
141 v4l2_err(&dev->v4l2_dev,
142 "unexpected answer of status request, len %d\n", ret);
143 goto unlock;
144 }
145 #ifdef HDPVR_DEBUG
146 else {
147 hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf,
148 sizeof(print_buf), 0);
149 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
150 "Status request returned, len %d: %s\n",
151 ret, print_buf);
152 }
153 #endif
154 if (dev->usbc_buf[1] == HDPVR_FIRMWARE_VERSION) {
155 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
156 } else if (dev->usbc_buf[1] == HDPVR_FIRMWARE_VERSION_AC3) {
157 dev->flags |= HDPVR_FLAG_AC3_CAP;
158 } else if (dev->usbc_buf[1] > HDPVR_FIRMWARE_VERSION_AC3) {
159 v4l2_info(&dev->v4l2_dev, "untested firmware version 0x%x, "
160 "the driver might not work\n", dev->usbc_buf[1]);
161 dev->flags |= HDPVR_FLAG_AC3_CAP;
162 } else {
163 v4l2_err(&dev->v4l2_dev, "unknown firmware version 0x%x\n",
164 dev->usbc_buf[1]);
165 ret = -EINVAL;
166 goto unlock;
167 }
168
169 response = dev->usbc_buf+38;
170 #ifdef HDPVR_DEBUG
171 hex_dump_to_buffer(response, 8, 16, 1, print_buf, sizeof(print_buf), 0);
172 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n",
173 print_buf);
174 #endif
175 challenge(response);
176 #ifdef HDPVR_DEBUG
177 hex_dump_to_buffer(response, 8, 16, 1, print_buf, sizeof(print_buf), 0);
178 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n",
179 print_buf);
180 #endif
181
182 msleep(100);
183 ret = usb_control_msg(dev->udev,
184 usb_sndctrlpipe(dev->udev, 0),
185 0xd1, 0x00 | request_type,
186 0x0000, 0x0000,
187 response, 8,
188 10000);
189 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
190 "magic request returned %d\n", ret);
191
192 retval = ret != 8;
193 unlock:
194 mutex_unlock(&dev->usbc_mutex);
195 return retval;
196 }
197
198 static int hdpvr_device_init(struct hdpvr_device *dev)
199 {
200 int ret;
201 u8 *buf;
202 struct hdpvr_video_info *vidinf;
203
204 if (device_authorization(dev))
205 return -EACCES;
206
207 /* default options for init */
208 hdpvr_set_options(dev);
209
210 /* set filter options */
211 mutex_lock(&dev->usbc_mutex);
212 buf = dev->usbc_buf;
213 buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
214 ret = usb_control_msg(dev->udev,
215 usb_sndctrlpipe(dev->udev, 0),
216 0x01, 0x38,
217 CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
218 buf, 4,
219 1000);
220 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
221 "control request returned %d\n", ret);
222 mutex_unlock(&dev->usbc_mutex);
223
224 vidinf = get_video_info(dev);
225 if (!vidinf)
226 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
227 "no valid video signal or device init failed\n");
228 else
229 kfree(vidinf);
230
231 /* enable fan and bling leds */
232 mutex_lock(&dev->usbc_mutex);
233 buf[0] = 0x1;
234 ret = usb_control_msg(dev->udev,
235 usb_sndctrlpipe(dev->udev, 0),
236 0xd4, 0x38, 0, 0, buf, 1,
237 1000);
238 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
239 "control request returned %d\n", ret);
240
241 /* boost analog audio */
242 buf[0] = boost_audio;
243 ret = usb_control_msg(dev->udev,
244 usb_sndctrlpipe(dev->udev, 0),
245 0xd5, 0x38, 0, 0, buf, 1,
246 1000);
247 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
248 "control request returned %d\n", ret);
249 mutex_unlock(&dev->usbc_mutex);
250
251 dev->status = STATUS_IDLE;
252 return 0;
253 }
254
255 static const struct hdpvr_options hdpvr_default_options = {
256 .video_std = HDPVR_60HZ,
257 .video_input = HDPVR_COMPONENT,
258 .audio_input = HDPVR_RCA_BACK,
259 .bitrate = 65, /* 6 mbps */
260 .peak_bitrate = 90, /* 9 mbps */
261 .bitrate_mode = HDPVR_CONSTANT,
262 .gop_mode = HDPVR_SIMPLE_IDR_GOP,
263 .audio_codec = V4L2_MPEG_AUDIO_ENCODING_AAC,
264 .brightness = 0x86,
265 .contrast = 0x80,
266 .hue = 0x80,
267 .saturation = 0x80,
268 .sharpness = 0x80,
269 };
270
271 static int hdpvr_probe(struct usb_interface *interface,
272 const struct usb_device_id *id)
273 {
274 struct hdpvr_device *dev;
275 struct usb_host_interface *iface_desc;
276 struct usb_endpoint_descriptor *endpoint;
277 size_t buffer_size;
278 int i;
279 int retval = -ENOMEM;
280
281 /* allocate memory for our device state and initialize it */
282 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
283 if (!dev) {
284 err("Out of memory");
285 goto error;
286 }
287
288 /* register v4l2_device early so it can be used for printks */
289 if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
290 err("v4l2_device_register failed");
291 goto error;
292 }
293
294 mutex_init(&dev->io_mutex);
295 mutex_init(&dev->i2c_mutex);
296 mutex_init(&dev->usbc_mutex);
297 dev->usbc_buf = kmalloc(64, GFP_KERNEL);
298 if (!dev->usbc_buf) {
299 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
300 goto error;
301 }
302
303 init_waitqueue_head(&dev->wait_buffer);
304 init_waitqueue_head(&dev->wait_data);
305
306 dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
307 if (!dev->workqueue)
308 goto error;
309
310 /* init video transfer queues */
311 INIT_LIST_HEAD(&dev->free_buff_list);
312 INIT_LIST_HEAD(&dev->rec_buff_list);
313
314 dev->options = hdpvr_default_options;
315
316 if (default_video_input < HDPVR_VIDEO_INPUTS)
317 dev->options.video_input = default_video_input;
318
319 if (default_audio_input < HDPVR_AUDIO_INPUTS)
320 dev->options.audio_input = default_audio_input;
321
322 dev->udev = usb_get_dev(interface_to_usbdev(interface));
323
324 /* set up the endpoint information */
325 /* use only the first bulk-in and bulk-out endpoints */
326 iface_desc = interface->cur_altsetting;
327 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
328 endpoint = &iface_desc->endpoint[i].desc;
329
330 if (!dev->bulk_in_endpointAddr &&
331 usb_endpoint_is_bulk_in(endpoint)) {
332 /* USB interface description is buggy, reported max
333 * packet size is 512 bytes, windows driver uses 8192 */
334 buffer_size = 8192;
335 dev->bulk_in_size = buffer_size;
336 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
337 }
338
339 }
340 if (!dev->bulk_in_endpointAddr) {
341 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
342 goto error;
343 }
344
345 /* init the device */
346 if (hdpvr_device_init(dev)) {
347 v4l2_err(&dev->v4l2_dev, "device init failed\n");
348 goto error;
349 }
350
351 mutex_lock(&dev->io_mutex);
352 if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
353 mutex_unlock(&dev->io_mutex);
354 v4l2_err(&dev->v4l2_dev,
355 "allocating transfer buffers failed\n");
356 goto error;
357 }
358 mutex_unlock(&dev->io_mutex);
359
360 if (hdpvr_register_videodev(dev, &interface->dev,
361 video_nr[atomic_inc_return(&dev_nr)])) {
362 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
363 goto error;
364 }
365
366 #ifdef CONFIG_I2C
367 /* until i2c is working properly */
368 retval = 0; /* hdpvr_register_i2c_adapter(dev); */
369 if (retval < 0) {
370 v4l2_err(&dev->v4l2_dev, "registering i2c adapter failed\n");
371 goto error;
372 }
373 #endif /* CONFIG_I2C */
374
375 /* save our data pointer in this interface device */
376 usb_set_intfdata(interface, dev);
377
378 /* let the user know what node this device is now attached to */
379 v4l2_info(&dev->v4l2_dev, "device now attached to /dev/video%d\n",
380 dev->video_dev->minor);
381 return 0;
382
383 error:
384 if (dev) {
385 /* this frees allocated memory */
386 hdpvr_delete(dev);
387 }
388 return retval;
389 }
390
391 static void hdpvr_disconnect(struct usb_interface *interface)
392 {
393 struct hdpvr_device *dev;
394 int minor;
395
396 dev = usb_get_intfdata(interface);
397 usb_set_intfdata(interface, NULL);
398
399 minor = dev->video_dev->minor;
400
401 /* prevent more I/O from starting and stop any ongoing */
402 mutex_lock(&dev->io_mutex);
403 dev->status = STATUS_DISCONNECTED;
404 v4l2_device_disconnect(&dev->v4l2_dev);
405 video_unregister_device(dev->video_dev);
406 wake_up_interruptible(&dev->wait_data);
407 wake_up_interruptible(&dev->wait_buffer);
408 mutex_unlock(&dev->io_mutex);
409 msleep(100);
410 flush_workqueue(dev->workqueue);
411 mutex_lock(&dev->io_mutex);
412 hdpvr_cancel_queue(dev);
413 destroy_workqueue(dev->workqueue);
414 mutex_unlock(&dev->io_mutex);
415
416 /* deregister I2C adapter */
417 #ifdef CONFIG_I2C
418 mutex_lock(&dev->i2c_mutex);
419 if (dev->i2c_adapter)
420 i2c_del_adapter(dev->i2c_adapter);
421 kfree(dev->i2c_adapter);
422 dev->i2c_adapter = NULL;
423 mutex_unlock(&dev->i2c_mutex);
424 #endif /* CONFIG_I2C */
425
426 atomic_dec(&dev_nr);
427
428 v4l2_info(&dev->v4l2_dev, "device /dev/video%d disconnected\n", minor);
429
430 v4l2_device_unregister(&dev->v4l2_dev);
431 kfree(dev->usbc_buf);
432 kfree(dev);
433 }
434
435
436 static struct usb_driver hdpvr_usb_driver = {
437 .name = "hdpvr",
438 .probe = hdpvr_probe,
439 .disconnect = hdpvr_disconnect,
440 .id_table = hdpvr_table,
441 };
442
443 static int __init hdpvr_init(void)
444 {
445 int result;
446
447 /* register this driver with the USB subsystem */
448 result = usb_register(&hdpvr_usb_driver);
449 if (result)
450 err("usb_register failed. Error number %d", result);
451
452 return result;
453 }
454
455 static void __exit hdpvr_exit(void)
456 {
457 /* deregister this driver with the USB subsystem */
458 usb_deregister(&hdpvr_usb_driver);
459 }
460
461 module_init(hdpvr_init);
462 module_exit(hdpvr_exit);
463
464 MODULE_LICENSE("GPL");
465 MODULE_AUTHOR("Janne Grunau");
466 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
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