Version:  2.0.40 2.2.26 2.4.37 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 3.16 3.17 3.18

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

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