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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 / 1=S-Video / 2=Composite");
 45 
 46 static uint default_audio_input = HDPVR_AUDIO_INPUTS;
 47 module_param(default_audio_input, uint, S_IRUGO|S_IWUSR);
 48 MODULE_PARM_DESC(default_audio_input, "default audio input: 0=RCA back / 1=RCA front / 2=S/PDIF");
 49 
 50 static bool boost_audio;
 51 module_param(boost_audio, bool, S_IRUGO|S_IWUSR);
 52 MODULE_PARM_DESC(boost_audio, "boost the audio signal");
 53 
 54 
 55 /* table of devices that work with this driver */
 56 static struct usb_device_id hdpvr_table[] = {
 57         { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID) },
 58         { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID1) },
 59         { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID2) },
 60         { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID3) },
 61         { USB_DEVICE(HD_PVR_VENDOR_ID, HD_PVR_PRODUCT_ID4) },
 62         { }                                     /* Terminating entry */
 63 };
 64 MODULE_DEVICE_TABLE(usb, hdpvr_table);
 65 
 66 
 67 void hdpvr_delete(struct hdpvr_device *dev)
 68 {
 69         hdpvr_free_buffers(dev);
 70         usb_put_dev(dev->udev);
 71 }
 72 
 73 static void challenge(u8 *bytes)
 74 {
 75         __le64 *i64P;
 76         u64 tmp64;
 77         uint i, idx;
 78 
 79         for (idx = 0; idx < 32; ++idx) {
 80 
 81                 if (idx & 0x3)
 82                         bytes[(idx >> 3) + 3] = bytes[(idx >> 2) & 0x3];
 83 
 84                 switch (idx & 0x3) {
 85                 case 0x3:
 86                         bytes[2] += bytes[3] * 4 + bytes[4] + bytes[5];
 87                         bytes[4] += bytes[(idx & 0x1) * 2] * 9 + 9;
 88                         break;
 89                 case 0x1:
 90                         bytes[0] *= 8;
 91                         bytes[0] += 7*idx + 4;
 92                         bytes[6] += bytes[3] * 3;
 93                         break;
 94                 case 0x0:
 95                         bytes[3 - (idx >> 3)] = bytes[idx >> 2];
 96                         bytes[5] += bytes[6] * 3;
 97                         for (i = 0; i < 3; i++)
 98                                 bytes[3] *= bytes[3] + 1;
 99                         break;
100                 case 0x2:
101                         for (i = 0; i < 3; i++)
102                                 bytes[1] *= bytes[6] + 1;
103                         for (i = 0; i < 3; i++) {
104                                 i64P = (__le64 *)bytes;
105                                 tmp64 = le64_to_cpup(i64P);
106                                 tmp64 = tmp64 + (tmp64 << (bytes[7] & 0x0f));
107                                 *i64P = cpu_to_le64(tmp64);
108                         }
109                         break;
110                 }
111         }
112 }
113 
114 /* try to init the device like the windows driver */
115 static int device_authorization(struct hdpvr_device *dev)
116 {
117 
118         int ret, retval = -ENOMEM;
119         char request_type = 0x38, rcv_request = 0x81;
120         char *response;
121 
122         mutex_lock(&dev->usbc_mutex);
123         ret = usb_control_msg(dev->udev,
124                               usb_rcvctrlpipe(dev->udev, 0),
125                               rcv_request, 0x80 | request_type,
126                               0x0400, 0x0003,
127                               dev->usbc_buf, 46,
128                               10000);
129         if (ret != 46) {
130                 v4l2_err(&dev->v4l2_dev,
131                          "unexpected answer of status request, len %d\n", ret);
132                 goto unlock;
133         }
134 #ifdef HDPVR_DEBUG
135         else {
136                 v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
137                          "Status request returned, len %d: %46ph\n",
138                          ret, dev->usbc_buf);
139         }
140 #endif
141 
142         dev->fw_ver = dev->usbc_buf[1];
143 
144         v4l2_info(&dev->v4l2_dev, "firmware version 0x%x dated %s\n",
145                           dev->fw_ver, &dev->usbc_buf[2]);
146 
147         if (dev->fw_ver > 0x15) {
148                 dev->options.brightness = 0x80;
149                 dev->options.contrast   = 0x40;
150                 dev->options.hue        = 0xf;
151                 dev->options.saturation = 0x40;
152                 dev->options.sharpness  = 0x80;
153         }
154 
155         switch (dev->fw_ver) {
156         case HDPVR_FIRMWARE_VERSION:
157                 dev->flags &= ~HDPVR_FLAG_AC3_CAP;
158                 break;
159         case HDPVR_FIRMWARE_VERSION_AC3:
160         case HDPVR_FIRMWARE_VERSION_0X12:
161         case HDPVR_FIRMWARE_VERSION_0X15:
162         case HDPVR_FIRMWARE_VERSION_0X1E:
163                 dev->flags |= HDPVR_FLAG_AC3_CAP;
164                 break;
165         default:
166                 v4l2_info(&dev->v4l2_dev, "untested firmware, the driver might not work.\n");
167                 if (dev->fw_ver >= HDPVR_FIRMWARE_VERSION_AC3)
168                         dev->flags |= HDPVR_FLAG_AC3_CAP;
169                 else
170                         dev->flags &= ~HDPVR_FLAG_AC3_CAP;
171         }
172 
173         response = dev->usbc_buf+38;
174 #ifdef HDPVR_DEBUG
175         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, "challenge: %8ph\n",
176                  response);
177 #endif
178         challenge(response);
179 #ifdef HDPVR_DEBUG
180         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev, " response: %8ph\n",
181                  response);
182 #endif
183 
184         msleep(100);
185         ret = usb_control_msg(dev->udev,
186                               usb_sndctrlpipe(dev->udev, 0),
187                               0xd1, 0x00 | request_type,
188                               0x0000, 0x0000,
189                               response, 8,
190                               10000);
191         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
192                  "magic request returned %d\n", ret);
193 
194         retval = ret != 8;
195 unlock:
196         mutex_unlock(&dev->usbc_mutex);
197         return retval;
198 }
199 
200 static int hdpvr_device_init(struct hdpvr_device *dev)
201 {
202         int ret;
203         u8 *buf;
204 
205         if (device_authorization(dev))
206                 return -EACCES;
207 
208         /* default options for init */
209         hdpvr_set_options(dev);
210 
211         /* set filter options */
212         mutex_lock(&dev->usbc_mutex);
213         buf = dev->usbc_buf;
214         buf[0] = 0x03; buf[1] = 0x03; buf[2] = 0x00; buf[3] = 0x00;
215         ret = usb_control_msg(dev->udev,
216                               usb_sndctrlpipe(dev->udev, 0),
217                               0x01, 0x38,
218                               CTRL_LOW_PASS_FILTER_VALUE, CTRL_DEFAULT_INDEX,
219                               buf, 4,
220                               1000);
221         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
222                  "control request returned %d\n", ret);
223         mutex_unlock(&dev->usbc_mutex);
224 
225         /* enable fan and bling leds */
226         mutex_lock(&dev->usbc_mutex);
227         buf[0] = 0x1;
228         ret = usb_control_msg(dev->udev,
229                               usb_sndctrlpipe(dev->udev, 0),
230                               0xd4, 0x38, 0, 0, buf, 1,
231                               1000);
232         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
233                  "control request returned %d\n", ret);
234 
235         /* boost analog audio */
236         buf[0] = boost_audio;
237         ret = usb_control_msg(dev->udev,
238                               usb_sndctrlpipe(dev->udev, 0),
239                               0xd5, 0x38, 0, 0, buf, 1,
240                               1000);
241         v4l2_dbg(MSG_INFO, hdpvr_debug, &dev->v4l2_dev,
242                  "control request returned %d\n", ret);
243         mutex_unlock(&dev->usbc_mutex);
244 
245         dev->status = STATUS_IDLE;
246         return 0;
247 }
248 
249 static const struct hdpvr_options hdpvr_default_options = {
250         .video_std      = HDPVR_60HZ,
251         .video_input    = HDPVR_COMPONENT,
252         .audio_input    = HDPVR_RCA_BACK,
253         .bitrate        = 65, /* 6 mbps */
254         .peak_bitrate   = 90, /* 9 mbps */
255         .bitrate_mode   = HDPVR_CONSTANT,
256         .gop_mode       = HDPVR_SIMPLE_IDR_GOP,
257         .audio_codec    = V4L2_MPEG_AUDIO_ENCODING_AAC,
258         /* original picture controls for firmware version <= 0x15 */
259         /* updated in device_authorization() for newer firmware */
260         .brightness     = 0x86,
261         .contrast       = 0x80,
262         .hue            = 0x80,
263         .saturation     = 0x80,
264         .sharpness      = 0x80,
265 };
266 
267 static int hdpvr_probe(struct usb_interface *interface,
268                        const struct usb_device_id *id)
269 {
270         struct hdpvr_device *dev;
271         struct usb_host_interface *iface_desc;
272         struct usb_endpoint_descriptor *endpoint;
273 #if IS_ENABLED(CONFIG_I2C)
274         struct i2c_client *client;
275 #endif
276         size_t buffer_size;
277         int i;
278         int retval = -ENOMEM;
279 
280         /* allocate memory for our device state and initialize it */
281         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
282         if (!dev) {
283                 dev_err(&interface->dev, "Out of memory\n");
284                 goto error;
285         }
286 
287         /* init video transfer queues first of all */
288         /* to prevent oops in hdpvr_delete() on error paths */
289         INIT_LIST_HEAD(&dev->free_buff_list);
290         INIT_LIST_HEAD(&dev->rec_buff_list);
291 
292         /* register v4l2_device early so it can be used for printks */
293         if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
294                 dev_err(&interface->dev, "v4l2_device_register failed\n");
295                 goto error;
296         }
297 
298         mutex_init(&dev->io_mutex);
299         mutex_init(&dev->i2c_mutex);
300         mutex_init(&dev->usbc_mutex);
301         dev->usbc_buf = kmalloc(64, GFP_KERNEL);
302         if (!dev->usbc_buf) {
303                 v4l2_err(&dev->v4l2_dev, "Out of memory\n");
304                 goto error;
305         }
306 
307         init_waitqueue_head(&dev->wait_buffer);
308         init_waitqueue_head(&dev->wait_data);
309 
310         dev->options = hdpvr_default_options;
311 
312         if (default_video_input < HDPVR_VIDEO_INPUTS)
313                 dev->options.video_input = default_video_input;
314 
315         if (default_audio_input < HDPVR_AUDIO_INPUTS) {
316                 dev->options.audio_input = default_audio_input;
317                 if (default_audio_input == HDPVR_SPDIF)
318                         dev->options.audio_codec =
319                                 V4L2_MPEG_AUDIO_ENCODING_AC3;
320         }
321 
322         dev->udev = usb_get_dev(interface_to_usbdev(interface));
323 
324         /* set up the endpoint information */
325         /* use only the first bulk-in and bulk-out endpoints */
326         iface_desc = interface->cur_altsetting;
327         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
328                 endpoint = &iface_desc->endpoint[i].desc;
329 
330                 if (!dev->bulk_in_endpointAddr &&
331                     usb_endpoint_is_bulk_in(endpoint)) {
332                         /* USB interface description is buggy, reported max
333                          * packet size is 512 bytes, windows driver uses 8192 */
334                         buffer_size = 8192;
335                         dev->bulk_in_size = buffer_size;
336                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
337                 }
338 
339         }
340         if (!dev->bulk_in_endpointAddr) {
341                 v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
342                 goto error;
343         }
344 
345         /* init the device */
346         if (hdpvr_device_init(dev)) {
347                 v4l2_err(&dev->v4l2_dev, "device init failed\n");
348                 goto error;
349         }
350 
351         mutex_lock(&dev->io_mutex);
352         if (hdpvr_alloc_buffers(dev, NUM_BUFFERS)) {
353                 mutex_unlock(&dev->io_mutex);
354                 v4l2_err(&dev->v4l2_dev,
355                          "allocating transfer buffers failed\n");
356                 goto error;
357         }
358         mutex_unlock(&dev->io_mutex);
359 
360 #if IS_ENABLED(CONFIG_I2C)
361         retval = hdpvr_register_i2c_adapter(dev);
362         if (retval < 0) {
363                 v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
364                 goto error;
365         }
366 
367         client = hdpvr_register_ir_rx_i2c(dev);
368         if (!client) {
369                 v4l2_err(&dev->v4l2_dev, "i2c IR RX device register failed\n");
370                 retval = -ENODEV;
371                 goto reg_fail;
372         }
373 
374         client = hdpvr_register_ir_tx_i2c(dev);
375         if (!client) {
376                 v4l2_err(&dev->v4l2_dev, "i2c IR TX device register failed\n");
377                 retval = -ENODEV;
378                 goto reg_fail;
379         }
380 #endif
381 
382         retval = hdpvr_register_videodev(dev, &interface->dev,
383                                     video_nr[atomic_inc_return(&dev_nr)]);
384         if (retval < 0) {
385                 v4l2_err(&dev->v4l2_dev, "registering videodev failed\n");
386                 goto reg_fail;
387         }
388 
389         /* let the user know what node this device is now attached to */
390         v4l2_info(&dev->v4l2_dev, "device now attached to %s\n",
391                   video_device_node_name(&dev->video_dev));
392         return 0;
393 
394 reg_fail:
395 #if IS_ENABLED(CONFIG_I2C)
396         i2c_del_adapter(&dev->i2c_adapter);
397 #endif
398 error:
399         if (dev) {
400                 flush_work(&dev->worker);
401                 /* this frees allocated memory */
402                 hdpvr_delete(dev);
403         }
404         return retval;
405 }
406 
407 static void hdpvr_disconnect(struct usb_interface *interface)
408 {
409         struct hdpvr_device *dev = to_hdpvr_dev(usb_get_intfdata(interface));
410 
411         v4l2_info(&dev->v4l2_dev, "device %s disconnected\n",
412                   video_device_node_name(&dev->video_dev));
413         /* prevent more I/O from starting and stop any ongoing */
414         mutex_lock(&dev->io_mutex);
415         dev->status = STATUS_DISCONNECTED;
416         wake_up_interruptible(&dev->wait_data);
417         wake_up_interruptible(&dev->wait_buffer);
418         mutex_unlock(&dev->io_mutex);
419         v4l2_device_disconnect(&dev->v4l2_dev);
420         msleep(100);
421         flush_work(&dev->worker);
422         mutex_lock(&dev->io_mutex);
423         hdpvr_cancel_queue(dev);
424         mutex_unlock(&dev->io_mutex);
425 #if IS_ENABLED(CONFIG_I2C)
426         i2c_del_adapter(&dev->i2c_adapter);
427 #endif
428         video_unregister_device(&dev->video_dev);
429         atomic_dec(&dev_nr);
430 }
431 
432 
433 static struct usb_driver hdpvr_usb_driver = {
434         .name =         "hdpvr",
435         .probe =        hdpvr_probe,
436         .disconnect =   hdpvr_disconnect,
437         .id_table =     hdpvr_table,
438 };
439 
440 module_usb_driver(hdpvr_usb_driver);
441 
442 MODULE_LICENSE("GPL");
443 MODULE_VERSION("0.2.1");
444 MODULE_AUTHOR("Janne Grunau");
445 MODULE_DESCRIPTION("Hauppauge HD PVR driver");
446 

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