Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/media/usb/hdpvr/hdpvr-core.c

  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 bool 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         __le64 *i64P;
 82         u64 tmp64;
 83         uint i, idx;
 84 
 85         for (idx = 0; idx < 32; ++idx) {
 86 
 87                 if (idx & 0x3)
 88                         bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
 89 
 90                 switch (idx & 0x3) {
 91                 case 0x3:
 92                         bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
 93                         bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
 94                         break;
 95                 case 0x1:
 96                         bytes[0] *= 8;
 97                         bytes[0] += 7*idx + 4;
 98                         bytes[6] += bytes[3] * 3;
 99                         break;
100                 case 0x0:
101                         bytes[3 - (idx >> 3)] = bytes[idx >> 2];
102                         bytes[5] += bytes[6] * 3;
103                         for (i = 0; i < 3; i++)
104                                 bytes[3] *= bytes[3] + 1;
105                         break;
106                 case 0x2:
107                         for (i = 0; i < 3; i++)
108                                 bytes[1] *= bytes[6] + 1;
109                         for (i = 0; i < 3; i++) {
110                                 i64P = (__le64 *)bytes;
111                                 tmp64 = le64_to_cpup(i64P);
112                                 tmp64 = tmp64 + (tmp64 << (bytes[7] & 0x0f));
113                                 *i64P = cpu_to_le64(tmp64);
114                         }
115                         break;
116                 }
117         }
118 }
119 
120 /* try to init the device like the windows driver */
121 static int device_authorization(struct hdpvr_device *dev)
122 {
123 
124         int ret, retval = -ENOMEM;
125         char request_type = 0x38, rcv_request = 0x81;
126         char *response;
127 #ifdef HDPVR_DEBUG
128         size_t buf_size = 46;
129         char *print_buf = kzalloc(5*buf_size+1, GFP_KERNEL);
130         if (!print_buf) {
131                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
132                 return retval;
133         }
134 #endif
135 
136         mutex_lock(&dev->usbc_mutex);
137         ret = usb_control_msg(dev->udev,
138                               usb_rcvctrlpipe(dev->udev, 0),
139                               rcv_request, 0x80 | request_type,
140                               0x0400, 0x0003,
141                               dev->usbc_buf, 46,
142                               10000);
143         if (ret != 46) {
144                 v4l2_err(&dev->v4l2_dev,
145                          "unexpected answer of status request, len %d\n", ret);
146                 goto unlock;
147         }
148 #ifdef HDPVR_DEBUG
149         else {
150                 hex_dump_to_buffer(dev->usbc_buf, 46, 16, 1, print_buf,
151                                    5*buf_size+1, 0);
152                 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
153                          "Status request returned, len %d: %s\n",
154                          ret, print_buf);
155         }
156 #endif
157 
158         dev->fw_ver = dev->usbc_buf[1];
159 
160         v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
161                           dev->fw_ver, &dev->usbc_buf[2]);
162 
163         if (dev->fw_ver > 0x15) {
164                 dev->options.brightness = 0x80;
165                 dev->options.contrast   = 0x40;
166                 dev->options.hue        = 0xf;
167                 dev->options.saturation = 0x40;
168                 dev->options.sharpness  = 0x80;
169         }
170 
171         switch (dev->fw_ver) {
172         case HDPVR_FIRMWARE_VERSION:
173                 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
174                 break;
175         case HDPVR_FIRMWARE_VERSION_AC3:
176         case HDPVR_FIRMWARE_VERSION_0X12:
177         case HDPVR_FIRMWARE_VERSION_0X15:
178         case HDPVR_FIRMWARE_VERSION_0X1E:
179                 dev->flags |= HDPVR_FLAG_AC3_CAP;
180                 break;
181         default:
182                 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might"
183                           " not work.\n");
184                 if (dev->fw_ver >= HDPVR_FIRMWARE_VERSION_AC3)
185                         dev->flags |= HDPVR_FLAG_AC3_CAP;
186                 else
187                         dev->flags &= ~HDPVR_FLAG_AC3_CAP;
188         }
189 
190         response = dev->usbc_buf+38;
191 #ifdef HDPVR_DEBUG
192         hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
193         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %s\n",
194                  print_buf);
195 #endif
196         challenge(response);
197 #ifdef HDPVR_DEBUG
198         hex_dump_to_buffer(response, 8, 16, 1, print_buf, 5*buf_size+1, 0);
199         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %s\n",
200                  print_buf);
201 #endif
202 
203         msleep(100);
204         ret = usb_control_msg(dev->udev,
205                               usb_sndctrlpipe(dev->udev, 0),
206                               0xd1, 0x00 | request_type,
207                               0x0000, 0x0000,
208                               response, 8,
209                               10000);
210         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
211                  "magic request returned %d\n", ret);
212 
213         retval = ret != 8;
214 unlock:
215         mutex_unlock(&dev->usbc_mutex);
216 #ifdef HDPVR_DEBUG
217         kfree(print_buf);
218 #endif
219         return retval;
220 }
221 
222 static int hdpvr_device_init(struct hdpvr_device *dev)
223 {
224         int ret;
225         u8 *buf;
226 
227         if (device_authorization(dev))
228                 return -EACCES;
229 
230         /* default options for init */
231         hdpvr_set_options(dev);
232 
233         /* set filter options */
234         mutex_lock(&dev->usbc_mutex);
235         buf = dev->usbc_buf;
236         buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
237         ret = usb_control_msg(dev->udev,
238                               usb_sndctrlpipe(dev->udev, 0),
239                               0x01, 0x38,
240                               CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
241                               buf, 4,
242                               1000);
243         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
244                  "control request returned %d\n", ret);
245         mutex_unlock(&dev->usbc_mutex);
246 
247         /* enable fan and bling leds */
248         mutex_lock(&dev->usbc_mutex);
249         buf[0] = 0x1;
250         ret = usb_control_msg(dev->udev,
251                               usb_sndctrlpipe(dev->udev, 0),
252                               0xd4, 0x38, 0, 0, buf, 1,
253                               1000);
254         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
255                  "control request returned %d\n", ret);
256 
257         /* boost analog audio */
258         buf[0] = boost_audio;
259         ret = usb_control_msg(dev->udev,
260                               usb_sndctrlpipe(dev->udev, 0),
261                               0xd5, 0x38, 0, 0, buf, 1,
262                               1000);
263         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
264                  "control request returned %d\n", ret);
265         mutex_unlock(&dev->usbc_mutex);
266 
267         dev->status = STATUS_IDLE;
268         return 0;
269 }
270 
271 static const struct hdpvr_options hdpvr_default_options = {
272         .video_std      = HDPVR_60HZ,
273         .video_input    = HDPVR_COMPONENT,
274         .audio_input    = HDPVR_RCA_BACK,
275         .bitrate        = 65, /* 6 mbps */
276         .peak_bitrate   = 90, /* 9 mbps */
277         .bitrate_mode   = HDPVR_CONSTANT,
278         .gop_mode       = HDPVR_SIMPLE_IDR_GOP,
279         .audio_codec    = V4L2_MPEG_AUDIO_ENCODING_AAC,
280         /* original picture controls for firmware version <= 0x15 */
281         /* updated in device_authorization() for newer firmware */
282         .brightness     = 0x86,
283         .contrast       = 0x80,
284         .hue            = 0x80,
285         .saturation     = 0x80,
286         .sharpness      = 0x80,
287 };
288 
289 static int hdpvr_probe(struct usb_interface *interface,
290                        const struct usb_device_id *id)
291 {
292         struct hdpvr_device *dev;
293         struct usb_host_interface *iface_desc;
294         struct usb_endpoint_descriptor *endpoint;
295         struct i2c_client *client;
296         size_t buffer_size;
297         int i;
298         int retval = -ENOMEM;
299 
300         /* allocate memory for our device state and initialize it */
301         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
302         if (!dev) {
303                 dev_err(&interface->dev, "Out of memory\n");
304                 goto error;
305         }
306 
307         /* init video transfer queues first of all */
308         /* to prevent oops in hdpvr_delete() on error paths */
309         INIT_LIST_HEAD(&dev->free_buff_list);
310         INIT_LIST_HEAD(&dev->rec_buff_list);
311 
312         /* register v4l2_device early so it can be used for printks */
313         if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
314                 dev_err(&interface->dev, "v4l2_device_register failed\n");
315                 goto error;
316         }
317 
318         mutex_init(&dev->io_mutex);
319         mutex_init(&dev->i2c_mutex);
320         mutex_init(&dev->usbc_mutex);
321         dev->usbc_buf = kmalloc(64, GFP_KERNEL);
322         if (!dev->usbc_buf) {
323                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
324                 goto error;
325         }
326 
327         init_waitqueue_head(&dev->wait_buffer);
328         init_waitqueue_head(&dev->wait_data);
329 
330         dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
331         if (!dev->workqueue)
332                 goto error;
333 
334         dev->options = hdpvr_default_options;
335 
336         if (default_video_input < HDPVR_VIDEO_INPUTS)
337                 dev->options.video_input = default_video_input;
338 
339         if (default_audio_input < HDPVR_AUDIO_INPUTS) {
340                 dev->options.audio_input = default_audio_input;
341                 if (default_audio_input == HDPVR_SPDIF)
342                         dev->options.audio_codec =
343                                 V4L2_MPEG_AUDIO_ENCODING_AC3;
344         }
345 
346         dev->udev = usb_get_dev(interface_to_usbdev(interface));
347 
348         /* set up the endpoint information */
349         /* use only the first bulk-in and bulk-out endpoints */
350         iface_desc = interface->cur_altsetting;
351         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
352                 endpoint = &iface_desc->endpoint[i].desc;
353 
354                 if (!dev->bulk_in_endpointAddr &&
355                     usb_endpoint_is_bulk_in(endpoint)) {
356                         /* USB interface description is buggy, reported max
357                          * packet size is 512 bytes, windows driver uses 8192 */
358                         buffer_size = 8192;
359                         dev->bulk_in_size = buffer_size;
360                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
361                 }
362 
363         }
364         if (!dev->bulk_in_endpointAddr) {
365                 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
366                 goto error;
367         }
368 
369         /* init the device */
370         if (hdpvr_device_init(dev)) {
371                 v4l2_err(&dev->v4l2_dev, "device init failed\n");
372                 goto error;
373         }
374 
375         mutex_lock(&dev->io_mutex);
376         if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
377                 mutex_unlock(&dev->io_mutex);
378                 v4l2_err(&dev->v4l2_dev,
379                          "allocating transfer buffers failed\n");
380                 goto error;
381         }
382         mutex_unlock(&dev->io_mutex);
383 
384 #if IS_ENABLED(CONFIG_I2C)
385         retval = hdpvr_register_i2c_adapter(dev);
386         if (retval < 0) {
387                 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
388                 goto error;
389         }
390 
391         client = hdpvr_register_ir_rx_i2c(dev);
392         if (!client) {
393                 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
394                 retval = -ENODEV;
395                 goto reg_fail;
396         }
397 
398         client = hdpvr_register_ir_tx_i2c(dev);
399         if (!client) {
400                 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
401                 retval = -ENODEV;
402                 goto reg_fail;
403         }
404 #endif
405 
406         retval = hdpvr_register_videodev(dev, &interface->dev,
407                                     video_nr[atomic_inc_return(&dev_nr)]);
408         if (retval < 0) {
409                 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
410                 goto reg_fail;
411         }
412 
413         /* let the user know what node this device is now attached to */
414         v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
415                   video_device_node_name(dev->video_dev));
416         return 0;
417 
418 reg_fail:
419 #if IS_ENABLED(CONFIG_I2C)
420         i2c_del_adapter(&dev->i2c_adapter);
421 #endif
422 error:
423         if (dev) {
424                 /* Destroy single thread */
425                 if (dev->workqueue)
426                         destroy_workqueue(dev->workqueue);
427                 /* this frees allocated memory */
428                 hdpvr_delete(dev);
429         }
430         return retval;
431 }
432 
433 static void hdpvr_disconnect(struct usb_interface *interface)
434 {
435         struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
436 
437         v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
438                   video_device_node_name(dev->video_dev));
439         /* prevent more I/O from starting and stop any ongoing */
440         mutex_lock(&dev->io_mutex);
441         dev->status = STATUS_DISCONNECTED;
442         wake_up_interruptible(&dev->wait_data);
443         wake_up_interruptible(&dev->wait_buffer);
444         mutex_unlock(&dev->io_mutex);
445         v4l2_device_disconnect(&dev->v4l2_dev);
446         msleep(100);
447         flush_workqueue(dev->workqueue);
448         mutex_lock(&dev->io_mutex);
449         hdpvr_cancel_queue(dev);
450         mutex_unlock(&dev->io_mutex);
451 #if IS_ENABLED(CONFIG_I2C)
452         i2c_del_adapter(&dev->i2c_adapter);
453 #endif
454         video_unregister_device(dev->video_dev);
455         atomic_dec(&dev_nr);
456 }
457 
458 
459 static struct usb_driver hdpvr_usb_driver = {
460         .name =         "hdpvr",
461         .probe =        hdpvr_probe,
462         .disconnect =   hdpvr_disconnect,
463         .id_table =     hdpvr_table,
464 };
465 
466 module_usb_driver(hdpvr_usb_driver);
467 
468 MODULE_LICENSE("GPL");
469 MODULE_VERSION("0.2.1");
470 MODULE_AUTHOR("Janne Grunau");
471 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
472 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us