Version:  2.0.40 2.2.26 2.4.37 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 3.19 4.0 4.1

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         usb_put_dev(dev->udev);
 73 }
 74 
 75 static void challenge(u8 *bytes)
 76 {
 77         __le64 *i64P;
 78         u64 tmp64;
 79         uint i, idx;
 80 
 81         for (idx = 0; idx < 32; ++idx) {
 82 
 83                 if (idx & 0x3)
 84                         bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
 85 
 86                 switch (idx & 0x3) {
 87                 case 0x3:
 88                         bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
 89                         bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
 90                         break;
 91                 case 0x1:
 92                         bytes[0] *= 8;
 93                         bytes[0] += 7*idx + 4;
 94                         bytes[6] += bytes[3] * 3;
 95                         break;
 96                 case 0x0:
 97                         bytes[3 - (idx >> 3)] = bytes[idx >> 2];
 98                         bytes[5] += bytes[6] * 3;
 99                         for (i = 0; i < 3; i++)
100                                 bytes[3] *= bytes[3] + 1;
101                         break;
102                 case 0x2:
103                         for (i = 0; i < 3; i++)
104                                 bytes[1] *= bytes[6] + 1;
105                         for (i = 0; i < 3; i++) {
106                                 i64P = (__le64 *)bytes;
107                                 tmp64 = le64_to_cpup(i64P);
108                                 tmp64 = tmp64 + (tmp64 << (bytes[7] & 0x0f));
109                                 *i64P = cpu_to_le64(tmp64);
110                         }
111                         break;
112                 }
113         }
114 }
115 
116 /* try to init the device like the windows driver */
117 static int device_authorization(struct hdpvr_device *dev)
118 {
119 
120         int ret, retval = -ENOMEM;
121         char request_type = 0x38, rcv_request = 0x81;
122         char *response;
123 
124         mutex_lock(&dev->usbc_mutex);
125         ret = usb_control_msg(dev->udev,
126                               usb_rcvctrlpipe(dev->udev, 0),
127                               rcv_request, 0x80 | request_type,
128                               0x0400, 0x0003,
129                               dev->usbc_buf, 46,
130                               10000);
131         if (ret != 46) {
132                 v4l2_err(&dev->v4l2_dev,
133                          "unexpected answer of status request, len %d\n", ret);
134                 goto unlock;
135         }
136 #ifdef HDPVR_DEBUG
137         else {
138                 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
139                          "Status request returned, len %d: %46ph\n",
140                          ret, dev->usbc_buf);
141         }
142 #endif
143 
144         dev->fw_ver = dev->usbc_buf[1];
145 
146         v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
147                           dev->fw_ver, &dev->usbc_buf[2]);
148 
149         if (dev->fw_ver > 0x15) {
150                 dev->options.brightness = 0x80;
151                 dev->options.contrast   = 0x40;
152                 dev->options.hue        = 0xf;
153                 dev->options.saturation = 0x40;
154                 dev->options.sharpness  = 0x80;
155         }
156 
157         switch (dev->fw_ver) {
158         case HDPVR_FIRMWARE_VERSION:
159                 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
160                 break;
161         case HDPVR_FIRMWARE_VERSION_AC3:
162         case HDPVR_FIRMWARE_VERSION_0X12:
163         case HDPVR_FIRMWARE_VERSION_0X15:
164         case HDPVR_FIRMWARE_VERSION_0X1E:
165                 dev->flags |= HDPVR_FLAG_AC3_CAP;
166                 break;
167         default:
168                 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might"
169                           " not work.\n");
170                 if (dev->fw_ver >= HDPVR_FIRMWARE_VERSION_AC3)
171                         dev->flags |= HDPVR_FLAG_AC3_CAP;
172                 else
173                         dev->flags &= ~HDPVR_FLAG_AC3_CAP;
174         }
175 
176         response = dev->usbc_buf+38;
177 #ifdef HDPVR_DEBUG
178         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %8ph\n",
179                  response);
180 #endif
181         challenge(response);
182 #ifdef HDPVR_DEBUG
183         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %8ph\n",
184                  response);
185 #endif
186 
187         msleep(100);
188         ret = usb_control_msg(dev->udev,
189                               usb_sndctrlpipe(dev->udev, 0),
190                               0xd1, 0x00 | request_type,
191                               0x0000, 0x0000,
192                               response, 8,
193                               10000);
194         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
195                  "magic request returned %d\n", ret);
196 
197         retval = ret != 8;
198 unlock:
199         mutex_unlock(&dev->usbc_mutex);
200         return retval;
201 }
202 
203 static int hdpvr_device_init(struct hdpvr_device *dev)
204 {
205         int ret;
206         u8 *buf;
207 
208         if (device_authorization(dev))
209                 return -EACCES;
210 
211         /* default options for init */
212         hdpvr_set_options(dev);
213 
214         /* set filter options */
215         mutex_lock(&dev->usbc_mutex);
216         buf = dev->usbc_buf;
217         buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
218         ret = usb_control_msg(dev->udev,
219                               usb_sndctrlpipe(dev->udev, 0),
220                               0x01, 0x38,
221                               CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
222                               buf, 4,
223                               1000);
224         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
225                  "control request returned %d\n", ret);
226         mutex_unlock(&dev->usbc_mutex);
227 
228         /* enable fan and bling leds */
229         mutex_lock(&dev->usbc_mutex);
230         buf[0] = 0x1;
231         ret = usb_control_msg(dev->udev,
232                               usb_sndctrlpipe(dev->udev, 0),
233                               0xd4, 0x38, 0, 0, buf, 1,
234                               1000);
235         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
236                  "control request returned %d\n", ret);
237 
238         /* boost analog audio */
239         buf[0] = boost_audio;
240         ret = usb_control_msg(dev->udev,
241                               usb_sndctrlpipe(dev->udev, 0),
242                               0xd5, 0x38, 0, 0, buf, 1,
243                               1000);
244         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
245                  "control request returned %d\n", ret);
246         mutex_unlock(&dev->usbc_mutex);
247 
248         dev->status = STATUS_IDLE;
249         return 0;
250 }
251 
252 static const struct hdpvr_options hdpvr_default_options = {
253         .video_std      = HDPVR_60HZ,
254         .video_input    = HDPVR_COMPONENT,
255         .audio_input    = HDPVR_RCA_BACK,
256         .bitrate        = 65, /* 6 mbps */
257         .peak_bitrate   = 90, /* 9 mbps */
258         .bitrate_mode   = HDPVR_CONSTANT,
259         .gop_mode       = HDPVR_SIMPLE_IDR_GOP,
260         .audio_codec    = V4L2_MPEG_AUDIO_ENCODING_AAC,
261         /* original picture controls for firmware version <= 0x15 */
262         /* updated in device_authorization() for newer firmware */
263         .brightness     = 0x86,
264         .contrast       = 0x80,
265         .hue            = 0x80,
266         .saturation     = 0x80,
267         .sharpness      = 0x80,
268 };
269 
270 static int hdpvr_probe(struct usb_interface *interface,
271                        const struct usb_device_id *id)
272 {
273         struct hdpvr_device *dev;
274         struct usb_host_interface *iface_desc;
275         struct usb_endpoint_descriptor *endpoint;
276         struct i2c_client *client;
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                 dev_err(&interface->dev, "Out of memory\n");
285                 goto error;
286         }
287 
288         /* init video transfer queues first of all */
289         /* to prevent oops in hdpvr_delete() on error paths */
290         INIT_LIST_HEAD(&dev->free_buff_list);
291         INIT_LIST_HEAD(&dev->rec_buff_list);
292 
293         /* register v4l2_device early so it can be used for printks */
294         if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
295                 dev_err(&interface->dev, "v4l2_device_register failed\n");
296                 goto error;
297         }
298 
299         mutex_init(&dev->io_mutex);
300         mutex_init(&dev->i2c_mutex);
301         mutex_init(&dev->usbc_mutex);
302         dev->usbc_buf = kmalloc(64, GFP_KERNEL);
303         if (!dev->usbc_buf) {
304                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
305                 goto error;
306         }
307 
308         init_waitqueue_head(&dev->wait_buffer);
309         init_waitqueue_head(&dev->wait_data);
310 
311         dev->workqueue = create_singlethread_workqueue("hdpvr_buffer");
312         if (!dev->workqueue)
313                 goto error;
314 
315         dev->options = hdpvr_default_options;
316 
317         if (default_video_input < HDPVR_VIDEO_INPUTS)
318                 dev->options.video_input = default_video_input;
319 
320         if (default_audio_input < HDPVR_AUDIO_INPUTS) {
321                 dev->options.audio_input = default_audio_input;
322                 if (default_audio_input == HDPVR_SPDIF)
323                         dev->options.audio_codec =
324                                 V4L2_MPEG_AUDIO_ENCODING_AC3;
325         }
326 
327         dev->udev = usb_get_dev(interface_to_usbdev(interface));
328 
329         /* set up the endpoint information */
330         /* use only the first bulk-in and bulk-out endpoints */
331         iface_desc = interface->cur_altsetting;
332         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
333                 endpoint = &iface_desc->endpoint[i].desc;
334 
335                 if (!dev->bulk_in_endpointAddr &&
336                     usb_endpoint_is_bulk_in(endpoint)) {
337                         /* USB interface description is buggy, reported max
338                          * packet size is 512 bytes, windows driver uses 8192 */
339                         buffer_size = 8192;
340                         dev->bulk_in_size = buffer_size;
341                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
342                 }
343 
344         }
345         if (!dev->bulk_in_endpointAddr) {
346                 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
347                 goto error;
348         }
349 
350         /* init the device */
351         if (hdpvr_device_init(dev)) {
352                 v4l2_err(&dev->v4l2_dev, "device init failed\n");
353                 goto error;
354         }
355 
356         mutex_lock(&dev->io_mutex);
357         if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
358                 mutex_unlock(&dev->io_mutex);
359                 v4l2_err(&dev->v4l2_dev,
360                          "allocating transfer buffers failed\n");
361                 goto error;
362         }
363         mutex_unlock(&dev->io_mutex);
364 
365 #if IS_ENABLED(CONFIG_I2C)
366         retval = hdpvr_register_i2c_adapter(dev);
367         if (retval < 0) {
368                 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
369                 goto error;
370         }
371 
372         client = hdpvr_register_ir_rx_i2c(dev);
373         if (!client) {
374                 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
375                 retval = -ENODEV;
376                 goto reg_fail;
377         }
378 
379         client = hdpvr_register_ir_tx_i2c(dev);
380         if (!client) {
381                 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
382                 retval = -ENODEV;
383                 goto reg_fail;
384         }
385 #endif
386 
387         retval = hdpvr_register_videodev(dev, &interface->dev,
388                                     video_nr[atomic_inc_return(&dev_nr)]);
389         if (retval < 0) {
390                 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
391                 goto reg_fail;
392         }
393 
394         /* let the user know what node this device is now attached to */
395         v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
396                   video_device_node_name(&dev->video_dev));
397         return 0;
398 
399 reg_fail:
400 #if IS_ENABLED(CONFIG_I2C)
401         i2c_del_adapter(&dev->i2c_adapter);
402 #endif
403 error:
404         if (dev) {
405                 /* Destroy single thread */
406                 if (dev->workqueue)
407                         destroy_workqueue(dev->workqueue);
408                 /* this frees allocated memory */
409                 hdpvr_delete(dev);
410         }
411         return retval;
412 }
413 
414 static void hdpvr_disconnect(struct usb_interface *interface)
415 {
416         struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
417 
418         v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
419                   video_device_node_name(&dev->video_dev));
420         /* prevent more I/O from starting and stop any ongoing */
421         mutex_lock(&dev->io_mutex);
422         dev->status = STATUS_DISCONNECTED;
423         wake_up_interruptible(&dev->wait_data);
424         wake_up_interruptible(&dev->wait_buffer);
425         mutex_unlock(&dev->io_mutex);
426         v4l2_device_disconnect(&dev->v4l2_dev);
427         msleep(100);
428         flush_workqueue(dev->workqueue);
429         mutex_lock(&dev->io_mutex);
430         hdpvr_cancel_queue(dev);
431         mutex_unlock(&dev->io_mutex);
432 #if IS_ENABLED(CONFIG_I2C)
433         i2c_del_adapter(&dev->i2c_adapter);
434 #endif
435         video_unregister_device(&dev->video_dev);
436         atomic_dec(&dev_nr);
437 }
438 
439 
440 static struct usb_driver hdpvr_usb_driver = {
441         .name =         "hdpvr",
442         .probe =        hdpvr_probe,
443         .disconnect =   hdpvr_disconnect,
444         .id_table =     hdpvr_table,
445 };
446 
447 module_usb_driver(hdpvr_usb_driver);
448 
449 MODULE_LICENSE("GPL");
450 MODULE_VERSION("0.2.1");
451 MODULE_AUTHOR("Janne Grunau");
452 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
453 

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