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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / media / video / hdpvr / hdpvr-core.c
blob441dacf642bb090fc270676403868f778d3b34e3
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 <linux/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 static 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 static 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 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID3) },
63 { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID4) },
64 { } /* Terminating entry */
65 };
66 MODULE_DEVICE_TABLE(usb, hdpvr_table);
67
68
69 void hdpvr_delete(struct hdpvr_device *dev)
70 {
71 hdpvr_free_buffers(dev);
72
73 if (dev->video_dev)
74 video_device_release(dev->video_dev);
75
76 usb_put_dev(dev->udev);
77 }
78
79 static void challenge(u8 *bytes)
80 {
81 u64 *i64P, tmp64;
82 uint i, idx;
83
84 for (idx = 0; idx < 32; ++idx) {
85
86 if (idx & 0x3)
87 bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
88
89 switch (idx & 0x3) {
90 case 0x3:
91 bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
92 bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
93 break;
94 case 0x1:
95 bytes[0] *= 8;
96 bytes[0] += 7*idx + 4;
97 bytes[6] += bytes[3] * 3;
98 break;
99 case 0x0:
100 bytes[3 - (idx >> 3)] = bytes[idx >> 2];
101 bytes[5] += bytes[6] * 3;
102 for (i = 0; i < 3; i++)
103 bytes[3] *= bytes[3] + 1;
104 break;
105 case 0x2:
106 for (i = 0; i < 3; i++)
107 bytes[1] *= bytes[6] + 1;
108 for (i = 0; i < 3; i++) {
109 i64P = (u64 *)bytes;
110 tmp64 = le64_to_cpup(i64P);
111 tmp64 <<= bytes[7] & 0x0f;
112 *i64P += cpu_to_le64(tmp64);
113 }
114 break;
115 }
116 }
117 }
118
119 /* try to init the device like the windows driver */
120 static int device_authorization(struct hdpvr_device *dev)
121 {
122
123 int ret, retval = -ENOMEM;
124 char request_type = 0x38, rcv_request = 0x81;
125 char *response;
126 #ifdef HDPVR_DEBUG
127 size_t buf_size = 46;
128 char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL);
129 if (!print_buf) {
130 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
131 return retval;
132 }
133 #endif
134
135 mutex_lock(&dev->usbc_mutex);
136 ret = usb_control_msg(dev->udev,
137 usb_rcvctrlpipe(dev->udev, 0),
138 rcv_request, 0x80 | request_type,
139 0x0400, 0x0003,
140 dev->usbc_buf, 46,
141 10000);
142 if (ret != 46) {
143 v4l2_err(&dev->v4l2_dev,
144 "unexpected answer of status request, len %d\n", ret);
145 goto unlock;
146 }
147 #ifdef HDPVR_DEBUG
148 else {
149 hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf,
150 5*buf_size+1, 0);
151 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
152 "Status request returned, len %d: %s\n",
153 ret, print_buf);
154 }
155 #endif
156
157 v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
158 dev->usbc_buf[1], &dev->usbc_buf[2]);
159
160 switch (dev->usbc_buf[1]) {
161 case HDPVR_FIRMWARE_VERSION:
162 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
163 break;
164 case HDPVR_FIRMWARE_VERSION_AC3:
165 case HDPVR_FIRMWARE_VERSION_0X12:
166 case HDPVR_FIRMWARE_VERSION_0X15:
167 dev->flags |= HDPVR_FLAG_AC3_CAP;
168 break;
169 default:
170 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might"
171 " not work.\n");
172 if (dev->usbc_buf[1] >= HDPVR_FIRMWARE_VERSION_AC3)
173 dev->flags |= HDPVR_FLAG_AC3_CAP;
174 else
175 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
176 }
177
178 response = dev->usbc_buf+38;
179 #ifdef HDPVR_DEBUG
180 hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
181 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n",
182 print_buf);
183 #endif
184 challenge(response);
185 #ifdef HDPVR_DEBUG
186 hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
187 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n",
188 print_buf);
189 #endif
190
191 msleep(100);
192 ret = usb_control_msg(dev->udev,
193 usb_sndctrlpipe(dev->udev, 0),
194 0xd1, 0x00 | request_type,
195 0x0000, 0x0000,
196 response, 8,
197 10000);
198 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
199 "magic request returned %d\n", ret);
200
201 retval = ret != 8;
202 unlock:
203 mutex_unlock(&dev->usbc_mutex);
204 return retval;
205 }
206
207 static int hdpvr_device_init(struct hdpvr_device *dev)
208 {
209 int ret;
210 u8 *buf;
211 struct hdpvr_video_info *vidinf;
212
213 if (device_authorization(dev))
214 return -EACCES;
215
216 /* default options for init */
217 hdpvr_set_options(dev);
218
219 /* set filter options */
220 mutex_lock(&dev->usbc_mutex);
221 buf = dev->usbc_buf;
222 buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
223 ret = usb_control_msg(dev->udev,
224 usb_sndctrlpipe(dev->udev, 0),
225 0x01, 0x38,
226 CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
227 buf, 4,
228 1000);
229 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
230 "control request returned %d\n", ret);
231 mutex_unlock(&dev->usbc_mutex);
232
233 vidinf = get_video_info(dev);
234 if (!vidinf)
235 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
236 "no valid video signal or device init failed\n");
237 else
238 kfree(vidinf);
239
240 /* enable fan and bling leds */
241 mutex_lock(&dev->usbc_mutex);
242 buf[0] = 0x1;
243 ret = usb_control_msg(dev->udev,
244 usb_sndctrlpipe(dev->udev, 0),
245 0xd4, 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
250 /* boost analog audio */
251 buf[0] = boost_audio;
252 ret = usb_control_msg(dev->udev,
253 usb_sndctrlpipe(dev->udev, 0),
254 0xd5, 0x38, 0, 0, buf, 1,
255 1000);
256 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
257 "control request returned %d\n", ret);
258 mutex_unlock(&dev->usbc_mutex);
259
260 dev->status = STATUS_IDLE;
261 return 0;
262 }
263
264 static const struct hdpvr_options hdpvr_default_options = {
265 .video_std = HDPVR_60HZ,
266 .video_input = HDPVR_COMPONENT,
267 .audio_input = HDPVR_RCA_BACK,
268 .bitrate = 65, /* 6 mbps */
269 .peak_bitrate = 90, /* 9 mbps */
270 .bitrate_mode = HDPVR_CONSTANT,
271 .gop_mode = HDPVR_SIMPLE_IDR_GOP,
272 .audio_codec = V4L2_MPEG_AUDIO_ENCODING_AAC,
273 .brightness = 0x86,
274 .contrast = 0x80,
275 .hue = 0x80,
276 .saturation = 0x80,
277 .sharpness = 0x80,
278 };
279
280 static int hdpvr_probe(struct usb_interface *interface,
281 const struct usb_device_id *id)
282 {
283 struct hdpvr_device *dev;
284 struct usb_host_interface *iface_desc;
285 struct usb_endpoint_descriptor *endpoint;
286 struct i2c_client *client;
287 size_t buffer_size;
288 int i;
289 int retval = -ENOMEM;
290
291 /* allocate memory for our device state and initialize it */
292 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
293 if (!dev) {
294 err("Out of memory");
295 goto error;
296 }
297
298 dev->workqueue = 0;
299
300 /* register v4l2_device early so it can be used for printks */
301 if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
302 err("v4l2_device_register failed");
303 goto error;
304 }
305
306 mutex_init(&dev->io_mutex);
307 mutex_init(&dev->i2c_mutex);
308 mutex_init(&dev->usbc_mutex);
309 dev->usbc_buf = kmalloc(64, GFP_KERNEL);
310 if (!dev->usbc_buf) {
311 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
312 goto error;
313 }
314
315 init_waitqueue_head(&dev->wait_buffer);
316 init_waitqueue_head(&dev->wait_data);
317
318 dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
319 if (!dev->workqueue)
320 goto error;
321
322 /* init video transfer queues */
323 INIT_LIST_HEAD(&dev->free_buff_list);
324 INIT_LIST_HEAD(&dev->rec_buff_list);
325
326 dev->options = hdpvr_default_options;
327
328 if (default_video_input < HDPVR_VIDEO_INPUTS)
329 dev->options.video_input = default_video_input;
330
331 if (default_audio_input < HDPVR_AUDIO_INPUTS) {
332 dev->options.audio_input = default_audio_input;
333 if (default_audio_input == HDPVR_SPDIF)
334 dev->options.audio_codec =
335 V4L2_MPEG_AUDIO_ENCODING_AC3;
336 }
337
338 dev->udev = usb_get_dev(interface_to_usbdev(interface));
339
340 /* set up the endpoint information */
341 /* use only the first bulk-in and bulk-out endpoints */
342 iface_desc = interface->cur_altsetting;
343 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
344 endpoint = &iface_desc->endpoint[i].desc;
345
346 if (!dev->bulk_in_endpointAddr &&
347 usb_endpoint_is_bulk_in(endpoint)) {
348 /* USB interface description is buggy, reported max
349 * packet size is 512 bytes, windows driver uses 8192 */
350 buffer_size = 8192;
351 dev->bulk_in_size = buffer_size;
352 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
353 }
354
355 }
356 if (!dev->bulk_in_endpointAddr) {
357 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
358 goto error;
359 }
360
361 /* init the device */
362 if (hdpvr_device_init(dev)) {
363 v4l2_err(&dev->v4l2_dev, "device init failed\n");
364 goto error;
365 }
366
367 mutex_lock(&dev->io_mutex);
368 if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
369 mutex_unlock(&dev->io_mutex);
370 v4l2_err(&dev->v4l2_dev,
371 "allocating transfer buffers failed\n");
372 goto error;
373 }
374 mutex_unlock(&dev->io_mutex);
375
376 if (hdpvr_register_videodev(dev, &interface->dev,
377 video_nr[atomic_inc_return(&dev_nr)])) {
378 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
379 goto error;
380 }
381
382 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
383 retval = hdpvr_register_i2c_adapter(dev);
384 if (retval < 0) {
385 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
386 goto error;
387 }
388
389 client = hdpvr_register_ir_rx_i2c(dev);
390 if (!client) {
391 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
392 goto reg_fail;
393 }
394
395 client = hdpvr_register_ir_tx_i2c(dev);
396 if (!client) {
397 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
398 goto reg_fail;
399 }
400 #endif
401
402 /* let the user know what node this device is now attached to */
403 v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
404 video_device_node_name(dev->video_dev));
405 return 0;
406
407 reg_fail:
408 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
409 i2c_del_adapter(&dev->i2c_adapter);
410 #endif
411 error:
412 if (dev) {
413 /* Destroy single thread */
414 if (dev->workqueue)
415 destroy_workqueue(dev->workqueue);
416 /* this frees allocated memory */
417 hdpvr_delete(dev);
418 }
419 return retval;
420 }
421
422 static void hdpvr_disconnect(struct usb_interface *interface)
423 {
424 struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
425
426 v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
427 video_device_node_name(dev->video_dev));
428 /* prevent more I/O from starting and stop any ongoing */
429 mutex_lock(&dev->io_mutex);
430 dev->status = STATUS_DISCONNECTED;
431 wake_up_interruptible(&dev->wait_data);
432 wake_up_interruptible(&dev->wait_buffer);
433 mutex_unlock(&dev->io_mutex);
434 v4l2_device_disconnect(&dev->v4l2_dev);
435 msleep(100);
436 flush_workqueue(dev->workqueue);
437 mutex_lock(&dev->io_mutex);
438 hdpvr_cancel_queue(dev);
439 mutex_unlock(&dev->io_mutex);
440 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
441 i2c_del_adapter(&dev->i2c_adapter);
442 #endif
443 video_unregister_device(dev->video_dev);
444 atomic_dec(&dev_nr);
445 }
446
447
448 static struct usb_driver hdpvr_usb_driver = {
449 .name = "hdpvr",
450 .probe = hdpvr_probe,
451 .disconnect = hdpvr_disconnect,
452 .id_table = hdpvr_table,
453 };
454
455 static int __init hdpvr_init(void)
456 {
457 int result;
458
459 /* register this driver with the USB subsystem */
460 result = usb_register(&hdpvr_usb_driver);
461 if (result)
462 err("usb_register failed. Error number %d", result);
463
464 return result;
465 }
466
467 static void __exit hdpvr_exit(void)
468 {
469 /* deregister this driver with the USB subsystem */
470 usb_deregister(&hdpvr_usb_driver);
471 }
472
473 module_init(hdpvr_init);
474 module_exit(hdpvr_exit);
475
476 MODULE_LICENSE("GPL");
477 MODULE_VERSION("0.2.1");
478 MODULE_AUTHOR("Janne Grunau");
479 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
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