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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 #if IS_ENABLED(CONFIG_I2C)
277         struct i2c_client *client;
278 #endif
279         size_t buffer_size;
280         int i;
281         int retval = -ENOMEM;
282 
283         /* allocate memory for our device state and initialize it */
284         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
285         if (!dev) {
286                 dev_err(&interface->dev, "Out of memory\n");
287                 goto error;
288         }
289 
290         /* init video transfer queues first of all */
291         /* to prevent oops in hdpvr_delete() on error paths */
292         INIT_LIST_HEAD(&dev->free_buff_list);
293         INIT_LIST_HEAD(&dev->rec_buff_list);
294 
295         /* register v4l2_device early so it can be used for printks */
296         if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
297                 dev_err(&interface->dev, "v4l2_device_register failed\n");
298                 goto error;
299         }
300 
301         mutex_init(&dev->io_mutex);
302         mutex_init(&dev->i2c_mutex);
303         mutex_init(&dev->usbc_mutex);
304         dev->usbc_buf = kmalloc(64, GFP_KERNEL);
305         if (!dev->usbc_buf) {
306                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
307                 goto error;
308         }
309 
310         init_waitqueue_head(&dev->wait_buffer);
311         init_waitqueue_head(&dev->wait_data);
312 
313         dev->options = hdpvr_default_options;
314 
315         if (default_video_input < HDPVR_VIDEO_INPUTS)
316                 dev->options.video_input = default_video_input;
317 
318         if (default_audio_input < HDPVR_AUDIO_INPUTS) {
319                 dev->options.audio_input = default_audio_input;
320                 if (default_audio_input == HDPVR_SPDIF)
321                         dev->options.audio_codec =
322                                 V4L2_MPEG_AUDIO_ENCODING_AC3;
323         }
324 
325         dev->udev = usb_get_dev(interface_to_usbdev(interface));
326 
327         /* set up the endpoint information */
328         /* use only the first bulk-in and bulk-out endpoints */
329         iface_desc = interface->cur_altsetting;
330         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
331                 endpoint = &iface_desc->endpoint[i].desc;
332 
333                 if (!dev->bulk_in_endpointAddr &&
334                     usb_endpoint_is_bulk_in(endpoint)) {
335                         /* USB interface description is buggy, reported max
336                          * packet size is 512 bytes, windows driver uses 8192 */
337                         buffer_size = 8192;
338                         dev->bulk_in_size = buffer_size;
339                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
340                 }
341 
342         }
343         if (!dev->bulk_in_endpointAddr) {
344                 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
345                 goto error;
346         }
347 
348         /* init the device */
349         if (hdpvr_device_init(dev)) {
350                 v4l2_err(&dev->v4l2_dev, "device init failed\n");
351                 goto error;
352         }
353 
354         mutex_lock(&dev->io_mutex);
355         if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
356                 mutex_unlock(&dev->io_mutex);
357                 v4l2_err(&dev->v4l2_dev,
358                          "allocating transfer buffers failed\n");
359                 goto error;
360         }
361         mutex_unlock(&dev->io_mutex);
362 
363 #if IS_ENABLED(CONFIG_I2C)
364         retval = hdpvr_register_i2c_adapter(dev);
365         if (retval < 0) {
366                 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
367                 goto error;
368         }
369 
370         client = hdpvr_register_ir_rx_i2c(dev);
371         if (!client) {
372                 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
373                 retval = -ENODEV;
374                 goto reg_fail;
375         }
376 
377         client = hdpvr_register_ir_tx_i2c(dev);
378         if (!client) {
379                 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
380                 retval = -ENODEV;
381                 goto reg_fail;
382         }
383 #endif
384 
385         retval = hdpvr_register_videodev(dev, &interface->dev,
386                                     video_nr[atomic_inc_return(&dev_nr)]);
387         if (retval < 0) {
388                 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
389                 goto reg_fail;
390         }
391 
392         /* let the user know what node this device is now attached to */
393         v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
394                   video_device_node_name(&dev->video_dev));
395         return 0;
396 
397 reg_fail:
398 #if IS_ENABLED(CONFIG_I2C)
399         i2c_del_adapter(&dev->i2c_adapter);
400 #endif
401 error:
402         if (dev) {
403                 flush_work(&dev->worker);
404                 /* this frees allocated memory */
405                 hdpvr_delete(dev);
406         }
407         return retval;
408 }
409 
410 static void hdpvr_disconnect(struct usb_interface *interface)
411 {
412         struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
413 
414         v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
415                   video_device_node_name(&dev->video_dev));
416         /* prevent more I/O from starting and stop any ongoing */
417         mutex_lock(&dev->io_mutex);
418         dev->status = STATUS_DISCONNECTED;
419         wake_up_interruptible(&dev->wait_data);
420         wake_up_interruptible(&dev->wait_buffer);
421         mutex_unlock(&dev->io_mutex);
422         v4l2_device_disconnect(&dev->v4l2_dev);
423         msleep(100);
424         flush_work(&dev->worker);
425         mutex_lock(&dev->io_mutex);
426         hdpvr_cancel_queue(dev);
427         mutex_unlock(&dev->io_mutex);
428 #if IS_ENABLED(CONFIG_I2C)
429         i2c_del_adapter(&dev->i2c_adapter);
430 #endif
431         video_unregister_device(&dev->video_dev);
432         atomic_dec(&dev_nr);
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 module_usb_driver(hdpvr_usb_driver);
444 
445 MODULE_LICENSE("GPL");
446 MODULE_VERSION("0.2.1");
447 MODULE_AUTHOR("Janne Grunau");
448 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
449 

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