Merge tag 'media/v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[muen/linux.git] / drivers / media / dvb-frontends / rtl2832_sdr.c
1 /*
2  * Realtek RTL2832U SDR driver
3  *
4  * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
5  *
6  *    This program is free software; you can redistribute it and/or modify
7  *    it under the terms of the GNU General Public License as published by
8  *    the Free Software Foundation; either version 2 of the License, or
9  *    (at your option) any later version.
10  *
11  *    This program is distributed in the hope that it will be useful,
12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *    GNU General Public License for more details.
15  *
16  *    You should have received a copy of the GNU General Public License along
17  *    with this program; if not, write to the Free Software Foundation, Inc.,
18  *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  *
20  * GNU Radio plugin "gr-kernel" for device usage will be on:
21  * http://git.linuxtv.org/anttip/gr-kernel.git
22  *
23  */
24
25 #include "rtl2832_sdr.h"
26 #include "dvb_usb.h"
27
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ioctl.h>
30 #include <media/v4l2-ctrls.h>
31 #include <media/v4l2-event.h>
32 #include <media/videobuf2-v4l2.h>
33 #include <media/videobuf2-vmalloc.h>
34
35 #include <linux/platform_device.h>
36 #include <linux/jiffies.h>
37 #include <linux/math64.h>
38 #include <linux/regmap.h>
39
40 static bool rtl2832_sdr_emulated_fmt;
41 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
42 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
43
44 /* Original macro does not contain enough null pointer checks for our need */
45 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
46         ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
47
48 #define MAX_BULK_BUFS            (10)
49 #define BULK_BUFFER_SIZE         (128 * 512)
50
51 static const struct v4l2_frequency_band bands_adc[] = {
52         {
53                 .tuner = 0,
54                 .type = V4L2_TUNER_ADC,
55                 .index = 0,
56                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
57                 .rangelow   =  300000,
58                 .rangehigh  =  300000,
59         },
60         {
61                 .tuner = 0,
62                 .type = V4L2_TUNER_ADC,
63                 .index = 1,
64                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
65                 .rangelow   =  900001,
66                 .rangehigh  = 2800000,
67         },
68         {
69                 .tuner = 0,
70                 .type = V4L2_TUNER_ADC,
71                 .index = 2,
72                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
73                 .rangelow   = 3200000,
74                 .rangehigh  = 3200000,
75         },
76 };
77
78 static const struct v4l2_frequency_band bands_fm[] = {
79         {
80                 .tuner = 1,
81                 .type = V4L2_TUNER_RF,
82                 .index = 0,
83                 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
84                 .rangelow   =    50000000,
85                 .rangehigh  =  2000000000,
86         },
87 };
88
89 /* stream formats */
90 struct rtl2832_sdr_format {
91         char    *name;
92         u32     pixelformat;
93         u32     buffersize;
94 };
95
96 static struct rtl2832_sdr_format formats[] = {
97         {
98                 .name           = "Complex U8",
99                 .pixelformat    = V4L2_SDR_FMT_CU8,
100                 .buffersize     = BULK_BUFFER_SIZE,
101         }, {
102                 .name           = "Complex U16LE (emulated)",
103                 .pixelformat    = V4L2_SDR_FMT_CU16LE,
104                 .buffersize     = BULK_BUFFER_SIZE * 2,
105         },
106 };
107
108 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
109
110 /* intermediate buffers with raw data from the USB device */
111 struct rtl2832_sdr_frame_buf {
112         /* common v4l buffer stuff -- must be first */
113         struct vb2_v4l2_buffer vb;
114         struct list_head list;
115 };
116
117 struct rtl2832_sdr_dev {
118 #define POWER_ON           0  /* BIT(0) */
119 #define URB_BUF            1  /* BIT(1) */
120         unsigned long flags;
121
122         struct platform_device *pdev;
123         struct regmap *regmap;
124
125         struct video_device vdev;
126         struct v4l2_device v4l2_dev;
127         struct v4l2_subdev *v4l2_subdev;
128
129         /* videobuf2 queue and queued buffers list */
130         struct vb2_queue vb_queue;
131         struct list_head queued_bufs;
132         spinlock_t queued_bufs_lock; /* Protects queued_bufs */
133         unsigned sequence;           /* buffer sequence counter */
134
135         /* Note if taking both locks v4l2_lock must always be locked first! */
136         struct mutex v4l2_lock;      /* Protects everything else */
137         struct mutex vb_queue_lock;  /* Protects vb_queue and capt_file */
138
139         /* Pointer to our usb_device, will be NULL after unplug */
140         struct usb_device *udev; /* Both mutexes most be hold when setting! */
141
142         unsigned int vb_full; /* vb is full and packets dropped */
143
144         struct urb     *urb_list[MAX_BULK_BUFS];
145         int            buf_num;
146         unsigned long  buf_size;
147         u8             *buf_list[MAX_BULK_BUFS];
148         dma_addr_t     dma_addr[MAX_BULK_BUFS];
149         int urbs_initialized;
150         int urbs_submitted;
151
152         unsigned int f_adc, f_tuner;
153         u32 pixelformat;
154         u32 buffersize;
155         unsigned int num_formats;
156
157         /* Controls */
158         struct v4l2_ctrl_handler hdl;
159         struct v4l2_ctrl *bandwidth_auto;
160         struct v4l2_ctrl *bandwidth;
161
162         /* for sample rate calc */
163         unsigned int sample;
164         unsigned int sample_measured;
165         unsigned long jiffies_next;
166 };
167
168 /* Private functions */
169 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
170                 struct rtl2832_sdr_dev *dev)
171 {
172         unsigned long flags;
173         struct rtl2832_sdr_frame_buf *buf = NULL;
174
175         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
176         if (list_empty(&dev->queued_bufs))
177                 goto leave;
178
179         buf = list_entry(dev->queued_bufs.next,
180                         struct rtl2832_sdr_frame_buf, list);
181         list_del(&buf->list);
182 leave:
183         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
184         return buf;
185 }
186
187 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
188                 void *dst, const u8 *src, unsigned int src_len)
189 {
190         struct platform_device *pdev = dev->pdev;
191         unsigned int dst_len;
192
193         if (dev->pixelformat ==  V4L2_SDR_FMT_CU8) {
194                 /* native stream, no need to convert */
195                 memcpy(dst, src, src_len);
196                 dst_len = src_len;
197         } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
198                 /* convert u8 to u16 */
199                 unsigned int i;
200                 u16 *u16dst = dst;
201
202                 for (i = 0; i < src_len; i++)
203                         *u16dst++ = (src[i] << 8) | (src[i] >> 0);
204                 dst_len = 2 * src_len;
205         } else {
206                 dst_len = 0;
207         }
208
209         /* calculate sample rate and output it in 10 seconds intervals */
210         if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
211                 #define MSECS 10000UL
212                 unsigned int msecs = jiffies_to_msecs(jiffies -
213                                 dev->jiffies_next + msecs_to_jiffies(MSECS));
214                 unsigned int samples = dev->sample - dev->sample_measured;
215
216                 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
217                 dev->sample_measured = dev->sample;
218                 dev_dbg(&pdev->dev,
219                         "slen=%u samples=%u msecs=%u sample rate=%lu\n",
220                         src_len, samples, msecs, samples * 1000UL / msecs);
221         }
222
223         /* total number of I+Q pairs */
224         dev->sample += src_len / 2;
225
226         return dst_len;
227 }
228
229 /*
230  * This gets called for the bulk stream pipe. This is done in interrupt
231  * time, so it has to be fast, not crash, and not stall. Neat.
232  */
233 static void rtl2832_sdr_urb_complete(struct urb *urb)
234 {
235         struct rtl2832_sdr_dev *dev = urb->context;
236         struct platform_device *pdev = dev->pdev;
237         struct rtl2832_sdr_frame_buf *fbuf;
238
239         dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
240                             urb->status, urb->actual_length,
241                             urb->transfer_buffer_length, urb->error_count);
242
243         switch (urb->status) {
244         case 0:             /* success */
245         case -ETIMEDOUT:    /* NAK */
246                 break;
247         case -ECONNRESET:   /* kill */
248         case -ENOENT:
249         case -ESHUTDOWN:
250                 return;
251         default:            /* error */
252                 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
253                 break;
254         }
255
256         if (likely(urb->actual_length > 0)) {
257                 void *ptr;
258                 unsigned int len;
259                 /* get free framebuffer */
260                 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
261                 if (unlikely(fbuf == NULL)) {
262                         dev->vb_full++;
263                         dev_notice_ratelimited(&pdev->dev,
264                                                "videobuf is full, %d packets dropped\n",
265                                                dev->vb_full);
266                         goto skip;
267                 }
268
269                 /* fill framebuffer */
270                 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
271                 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
272                                 urb->actual_length);
273                 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
274                 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
275                 fbuf->vb.sequence = dev->sequence++;
276                 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
277         }
278 skip:
279         usb_submit_urb(urb, GFP_ATOMIC);
280 }
281
282 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
283 {
284         struct platform_device *pdev = dev->pdev;
285         int i;
286
287         for (i = dev->urbs_submitted - 1; i >= 0; i--) {
288                 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
289                 /* stop the URB */
290                 usb_kill_urb(dev->urb_list[i]);
291         }
292         dev->urbs_submitted = 0;
293
294         return 0;
295 }
296
297 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
298 {
299         struct platform_device *pdev = dev->pdev;
300         int i, ret;
301
302         for (i = 0; i < dev->urbs_initialized; i++) {
303                 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
304                 ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
305                 if (ret) {
306                         dev_err(&pdev->dev,
307                                 "Could not submit urb no. %d - get them all back\n",
308                                 i);
309                         rtl2832_sdr_kill_urbs(dev);
310                         return ret;
311                 }
312                 dev->urbs_submitted++;
313         }
314
315         return 0;
316 }
317
318 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
319 {
320         struct platform_device *pdev = dev->pdev;
321
322         if (test_bit(URB_BUF, &dev->flags)) {
323                 while (dev->buf_num) {
324                         dev->buf_num--;
325                         dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
326                         usb_free_coherent(dev->udev, dev->buf_size,
327                                           dev->buf_list[dev->buf_num],
328                                           dev->dma_addr[dev->buf_num]);
329                 }
330         }
331         clear_bit(URB_BUF, &dev->flags);
332
333         return 0;
334 }
335
336 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
337 {
338         struct platform_device *pdev = dev->pdev;
339
340         dev->buf_num = 0;
341         dev->buf_size = BULK_BUFFER_SIZE;
342
343         dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
344                 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
345
346         for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
347                 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
348                                 BULK_BUFFER_SIZE, GFP_KERNEL,
349                                 &dev->dma_addr[dev->buf_num]);
350                 if (!dev->buf_list[dev->buf_num]) {
351                         dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
352                                 dev->buf_num);
353                         rtl2832_sdr_free_stream_bufs(dev);
354                         return -ENOMEM;
355                 }
356
357                 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
358                         dev->buf_num, dev->buf_list[dev->buf_num],
359                         (long long)dev->dma_addr[dev->buf_num]);
360                 set_bit(URB_BUF, &dev->flags);
361         }
362
363         return 0;
364 }
365
366 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
367 {
368         struct platform_device *pdev = dev->pdev;
369         int i;
370
371         rtl2832_sdr_kill_urbs(dev);
372
373         for (i = dev->urbs_initialized - 1; i >= 0; i--) {
374                 if (dev->urb_list[i]) {
375                         dev_dbg(&pdev->dev, "free urb=%d\n", i);
376                         /* free the URBs */
377                         usb_free_urb(dev->urb_list[i]);
378                 }
379         }
380         dev->urbs_initialized = 0;
381
382         return 0;
383 }
384
385 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
386 {
387         struct platform_device *pdev = dev->pdev;
388         int i, j;
389
390         /* allocate the URBs */
391         for (i = 0; i < MAX_BULK_BUFS; i++) {
392                 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
393                 dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
394                 if (!dev->urb_list[i]) {
395                         for (j = 0; j < i; j++)
396                                 usb_free_urb(dev->urb_list[j]);
397                         return -ENOMEM;
398                 }
399                 usb_fill_bulk_urb(dev->urb_list[i],
400                                 dev->udev,
401                                 usb_rcvbulkpipe(dev->udev, 0x81),
402                                 dev->buf_list[i],
403                                 BULK_BUFFER_SIZE,
404                                 rtl2832_sdr_urb_complete, dev);
405
406                 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
407                 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
408                 dev->urbs_initialized++;
409         }
410
411         return 0;
412 }
413
414 /* Must be called with vb_queue_lock hold */
415 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
416 {
417         struct platform_device *pdev = dev->pdev;
418         unsigned long flags;
419
420         dev_dbg(&pdev->dev, "\n");
421
422         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
423         while (!list_empty(&dev->queued_bufs)) {
424                 struct rtl2832_sdr_frame_buf *buf;
425
426                 buf = list_entry(dev->queued_bufs.next,
427                                 struct rtl2832_sdr_frame_buf, list);
428                 list_del(&buf->list);
429                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
430         }
431         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
432 }
433
434 static int rtl2832_sdr_querycap(struct file *file, void *fh,
435                 struct v4l2_capability *cap)
436 {
437         struct rtl2832_sdr_dev *dev = video_drvdata(file);
438         struct platform_device *pdev = dev->pdev;
439
440         dev_dbg(&pdev->dev, "\n");
441
442         strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
443         strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
444         usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
445         cap->device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
446                         V4L2_CAP_READWRITE | V4L2_CAP_TUNER;
447         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
448         return 0;
449 }
450
451 /* Videobuf2 operations */
452 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
453                 unsigned int *nbuffers,
454                 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
455 {
456         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
457         struct platform_device *pdev = dev->pdev;
458
459         dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
460
461         /* Need at least 8 buffers */
462         if (vq->num_buffers + *nbuffers < 8)
463                 *nbuffers = 8 - vq->num_buffers;
464         *nplanes = 1;
465         sizes[0] = PAGE_ALIGN(dev->buffersize);
466         dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
467         return 0;
468 }
469
470 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
471 {
472         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
473
474         /* Don't allow queing new buffers after device disconnection */
475         if (!dev->udev)
476                 return -ENODEV;
477
478         return 0;
479 }
480
481 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
482 {
483         struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
484         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
485         struct rtl2832_sdr_frame_buf *buf =
486                         container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
487         unsigned long flags;
488
489         /* Check the device has not disconnected between prep and queuing */
490         if (!dev->udev) {
491                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
492                 return;
493         }
494
495         spin_lock_irqsave(&dev->queued_bufs_lock, flags);
496         list_add_tail(&buf->list, &dev->queued_bufs);
497         spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
498 }
499
500 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
501 {
502         struct platform_device *pdev = dev->pdev;
503         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
504         struct dvb_frontend *fe = pdata->dvb_frontend;
505         int ret;
506         unsigned int f_sr, f_if;
507         u8 buf[4], u8tmp1, u8tmp2;
508         u64 u64tmp;
509         u32 u32tmp;
510
511         dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
512
513         if (!test_bit(POWER_ON, &dev->flags))
514                 return 0;
515
516         if (dev->f_adc == 0)
517                 return 0;
518
519         f_sr = dev->f_adc;
520
521         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
522         if (ret)
523                 goto err;
524
525         ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
526         if (ret)
527                 goto err;
528
529         /* get IF from tuner */
530         if (fe->ops.tuner_ops.get_if_frequency)
531                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
532         else
533                 ret = -EINVAL;
534
535         if (ret)
536                 goto err;
537
538         /* program IF */
539         u64tmp = f_if % pdata->clk;
540         u64tmp *= 0x400000;
541         u64tmp = div_u64(u64tmp, pdata->clk);
542         u64tmp = -u64tmp;
543         u32tmp = u64tmp & 0x3fffff;
544
545         dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
546
547         buf[0] = (u32tmp >> 16) & 0xff;
548         buf[1] = (u32tmp >>  8) & 0xff;
549         buf[2] = (u32tmp >>  0) & 0xff;
550
551         ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
552         if (ret)
553                 goto err;
554
555         /* BB / IF mode */
556         /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
557         if (f_if) {
558                 u8tmp1 = 0x1a; /* disable Zero-IF */
559                 u8tmp2 = 0x8d; /* enable ADC I */
560         } else {
561                 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
562                 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
563         }
564
565         ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
566         if (ret)
567                 goto err;
568
569         ret = regmap_write(dev->regmap, 0x008, u8tmp2);
570         if (ret)
571                 goto err;
572
573         ret = regmap_write(dev->regmap, 0x006, 0x80);
574         if (ret)
575                 goto err;
576
577         /* program sampling rate (resampling down) */
578         u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
579         u32tmp <<= 2;
580         buf[0] = (u32tmp >> 24) & 0xff;
581         buf[1] = (u32tmp >> 16) & 0xff;
582         buf[2] = (u32tmp >>  8) & 0xff;
583         buf[3] = (u32tmp >>  0) & 0xff;
584         ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
585         if (ret)
586                 goto err;
587
588         /* low-pass filter */
589         ret = regmap_bulk_write(dev->regmap, 0x11c,
590                                 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
591                                 20);
592         if (ret)
593                 goto err;
594
595         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
596         if (ret)
597                 goto err;
598
599         /* mode */
600         ret = regmap_write(dev->regmap, 0x019, 0x05);
601         if (ret)
602                 goto err;
603
604         ret = regmap_bulk_write(dev->regmap, 0x01a,
605                                 "\x1b\x16\x0d\x06\x01\xff", 6);
606         if (ret)
607                 goto err;
608
609         /* FSM */
610         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
611         if (ret)
612                 goto err;
613
614         /* PID filter */
615         ret = regmap_write(dev->regmap, 0x061, 0x60);
616         if (ret)
617                 goto err;
618
619         /* used RF tuner based settings */
620         switch (pdata->tuner) {
621         case RTL2832_SDR_TUNER_E4000:
622                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
623                 ret = regmap_write(dev->regmap, 0x102, 0x40);
624                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
625                 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
626                 ret = regmap_write(dev->regmap, 0x104, 0xd0);
627                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
628                 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
629                 ret = regmap_write(dev->regmap, 0x106, 0x35);
630                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
631                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
632                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
633                 ret = regmap_write(dev->regmap, 0x107, 0x40);
634                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
635                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
636                 ret = regmap_write(dev->regmap, 0x108, 0x80);
637                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
638                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
639                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
640                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
641                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
642                 ret = regmap_write(dev->regmap, 0x011, 0xd4);
643                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
644                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
645                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
646                 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
647                 ret = regmap_write(dev->regmap, 0x1de, 0xec);
648                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
649                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
650                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
651                 ret = regmap_write(dev->regmap, 0x00d, 0x83);
652                 ret = regmap_write(dev->regmap, 0x010, 0x49);
653                 ret = regmap_write(dev->regmap, 0x00d, 0x87);
654                 ret = regmap_write(dev->regmap, 0x00d, 0x85);
655                 ret = regmap_write(dev->regmap, 0x013, 0x02);
656                 break;
657         case RTL2832_SDR_TUNER_FC0012:
658         case RTL2832_SDR_TUNER_FC0013:
659                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
660                 ret = regmap_write(dev->regmap, 0x102, 0x40);
661                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
662                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
663                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
664                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
665                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
666                 ret = regmap_write(dev->regmap, 0x106, 0x35);
667                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
668                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
669                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
670                 ret = regmap_write(dev->regmap, 0x107, 0x40);
671                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
672                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
673                 ret = regmap_write(dev->regmap, 0x108, 0x80);
674                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
675                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
676                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
677                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
678                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
679                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
680                 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
681                 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
682                 ret = regmap_write(dev->regmap, 0x1db, 0x00);
683                 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
684                 ret = regmap_write(dev->regmap, 0x1de, 0xef);
685                 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
686                 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
687                 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
688                 break;
689         case RTL2832_SDR_TUNER_R820T:
690         case RTL2832_SDR_TUNER_R828D:
691                 ret = regmap_write(dev->regmap, 0x112, 0x5a);
692                 ret = regmap_write(dev->regmap, 0x102, 0x40);
693                 ret = regmap_write(dev->regmap, 0x115, 0x01);
694                 ret = regmap_write(dev->regmap, 0x103, 0x80);
695                 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
696                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
697                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
698                 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
699                 ret = regmap_write(dev->regmap, 0x106, 0x35);
700                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
701                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
702                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
703                 ret = regmap_write(dev->regmap, 0x107, 0x40);
704                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
705                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
706                 ret = regmap_write(dev->regmap, 0x108, 0x80);
707                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
708                 ret = regmap_write(dev->regmap, 0x10a, 0x80);
709                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
710                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
711                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
712                 ret = regmap_write(dev->regmap, 0x011, 0xf4);
713                 break;
714         case RTL2832_SDR_TUNER_FC2580:
715                 ret = regmap_write(dev->regmap, 0x112, 0x39);
716                 ret = regmap_write(dev->regmap, 0x102, 0x40);
717                 ret = regmap_write(dev->regmap, 0x103, 0x5a);
718                 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
719                 ret = regmap_write(dev->regmap, 0x104, 0xcc);
720                 ret = regmap_write(dev->regmap, 0x105, 0xbe);
721                 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
722                 ret = regmap_write(dev->regmap, 0x106, 0x35);
723                 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
724                 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
725                 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
726                 ret = regmap_write(dev->regmap, 0x107, 0x40);
727                 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
728                 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
729                 ret = regmap_write(dev->regmap, 0x108, 0x80);
730                 ret = regmap_write(dev->regmap, 0x109, 0x7f);
731                 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
732                 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
733                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
734                 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
735                 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
736                 break;
737         default:
738                 dev_notice(&pdev->dev, "Unsupported tuner\n");
739         }
740
741         /* software reset */
742         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
743         if (ret)
744                 goto err;
745
746         ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
747         if (ret)
748                 goto err;
749 err:
750         return ret;
751 };
752
753 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
754 {
755         struct platform_device *pdev = dev->pdev;
756         int ret;
757
758         dev_dbg(&pdev->dev, "\n");
759
760         /* PID filter */
761         ret = regmap_write(dev->regmap, 0x061, 0xe0);
762         if (ret)
763                 goto err;
764
765         /* mode */
766         ret = regmap_write(dev->regmap, 0x019, 0x20);
767         if (ret)
768                 goto err;
769
770         ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
771         if (ret)
772                 goto err;
773
774         /* FSM */
775         ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
776         if (ret)
777                 goto err;
778
779         ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
780         if (ret)
781                 goto err;
782
783         ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
784         if (ret)
785                 goto err;
786 err:
787         return;
788 };
789
790 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
791 {
792         struct platform_device *pdev = dev->pdev;
793         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
794         struct dvb_frontend *fe = pdata->dvb_frontend;
795         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
796         struct v4l2_ctrl *bandwidth_auto;
797         struct v4l2_ctrl *bandwidth;
798
799         /*
800          * tuner RF (Hz)
801          */
802         if (dev->f_tuner == 0)
803                 return 0;
804
805         /*
806          * bandwidth (Hz)
807          */
808         bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
809                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
810         bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
811         if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
812                 c->bandwidth_hz = dev->f_adc;
813                 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
814         } else {
815                 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
816         }
817
818         c->frequency = dev->f_tuner;
819         c->delivery_system = SYS_DVBT;
820
821         dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
822                 c->frequency, c->bandwidth_hz);
823
824         if (!test_bit(POWER_ON, &dev->flags))
825                 return 0;
826
827         if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
828                 if (fe->ops.tuner_ops.set_params)
829                         fe->ops.tuner_ops.set_params(fe);
830         }
831
832         return 0;
833 };
834
835 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
836 {
837         struct platform_device *pdev = dev->pdev;
838         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
839         struct dvb_frontend *fe = pdata->dvb_frontend;
840
841         dev_dbg(&pdev->dev, "\n");
842
843         if (fe->ops.tuner_ops.init)
844                 fe->ops.tuner_ops.init(fe);
845
846         return 0;
847 };
848
849 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
850 {
851         struct platform_device *pdev = dev->pdev;
852         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
853         struct dvb_frontend *fe = pdata->dvb_frontend;
854
855         dev_dbg(&pdev->dev, "\n");
856
857         if (fe->ops.tuner_ops.sleep)
858                 fe->ops.tuner_ops.sleep(fe);
859
860         return;
861 };
862
863 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
864 {
865         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
866         struct platform_device *pdev = dev->pdev;
867         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
868         struct dvb_usb_device *d = pdata->dvb_usb_device;
869         int ret;
870
871         dev_dbg(&pdev->dev, "\n");
872
873         if (!dev->udev)
874                 return -ENODEV;
875
876         if (mutex_lock_interruptible(&dev->v4l2_lock))
877                 return -ERESTARTSYS;
878
879         if (d->props->power_ctrl)
880                 d->props->power_ctrl(d, 1);
881
882         /* enable ADC */
883         if (d->props->frontend_ctrl)
884                 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
885
886         set_bit(POWER_ON, &dev->flags);
887
888         /* wake-up tuner */
889         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
890                 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
891         else
892                 ret = rtl2832_sdr_set_tuner(dev);
893         if (ret)
894                 goto err;
895
896         ret = rtl2832_sdr_set_tuner_freq(dev);
897         if (ret)
898                 goto err;
899
900         ret = rtl2832_sdr_set_adc(dev);
901         if (ret)
902                 goto err;
903
904         ret = rtl2832_sdr_alloc_stream_bufs(dev);
905         if (ret)
906                 goto err;
907
908         ret = rtl2832_sdr_alloc_urbs(dev);
909         if (ret)
910                 goto err;
911
912         dev->sequence = 0;
913
914         ret = rtl2832_sdr_submit_urbs(dev);
915         if (ret)
916                 goto err;
917
918 err:
919         mutex_unlock(&dev->v4l2_lock);
920
921         return ret;
922 }
923
924 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
925 {
926         struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
927         struct platform_device *pdev = dev->pdev;
928         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
929         struct dvb_usb_device *d = pdata->dvb_usb_device;
930
931         dev_dbg(&pdev->dev, "\n");
932
933         mutex_lock(&dev->v4l2_lock);
934
935         rtl2832_sdr_kill_urbs(dev);
936         rtl2832_sdr_free_urbs(dev);
937         rtl2832_sdr_free_stream_bufs(dev);
938         rtl2832_sdr_cleanup_queued_bufs(dev);
939         rtl2832_sdr_unset_adc(dev);
940
941         /* sleep tuner */
942         if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
943                 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
944         else
945                 rtl2832_sdr_unset_tuner(dev);
946
947         clear_bit(POWER_ON, &dev->flags);
948
949         /* disable ADC */
950         if (d->props->frontend_ctrl)
951                 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
952
953         if (d->props->power_ctrl)
954                 d->props->power_ctrl(d, 0);
955
956         mutex_unlock(&dev->v4l2_lock);
957 }
958
959 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
960         .queue_setup            = rtl2832_sdr_queue_setup,
961         .buf_prepare            = rtl2832_sdr_buf_prepare,
962         .buf_queue              = rtl2832_sdr_buf_queue,
963         .start_streaming        = rtl2832_sdr_start_streaming,
964         .stop_streaming         = rtl2832_sdr_stop_streaming,
965         .wait_prepare           = vb2_ops_wait_prepare,
966         .wait_finish            = vb2_ops_wait_finish,
967 };
968
969 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
970                 struct v4l2_tuner *v)
971 {
972         struct rtl2832_sdr_dev *dev = video_drvdata(file);
973         struct platform_device *pdev = dev->pdev;
974         int ret;
975
976         dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
977
978         if (v->index == 0) {
979                 strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
980                 v->type = V4L2_TUNER_ADC;
981                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
982                 v->rangelow =   300000;
983                 v->rangehigh = 3200000;
984                 ret = 0;
985         } else if (v->index == 1 &&
986                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
987                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
988         } else if (v->index == 1) {
989                 strscpy(v->name, "RF: <unknown>", sizeof(v->name));
990                 v->type = V4L2_TUNER_RF;
991                 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
992                 v->rangelow =    50000000;
993                 v->rangehigh = 2000000000;
994                 ret = 0;
995         } else {
996                 ret = -EINVAL;
997         }
998         return ret;
999 }
1000
1001 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
1002                 const struct v4l2_tuner *v)
1003 {
1004         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1005         struct platform_device *pdev = dev->pdev;
1006         int ret;
1007
1008         dev_dbg(&pdev->dev, "\n");
1009
1010         if (v->index == 0) {
1011                 ret = 0;
1012         } else if (v->index == 1 &&
1013                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
1014                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
1015         } else if (v->index == 1) {
1016                 ret = 0;
1017         } else {
1018                 ret = -EINVAL;
1019         }
1020         return ret;
1021 }
1022
1023 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1024                 struct v4l2_frequency_band *band)
1025 {
1026         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1027         struct platform_device *pdev = dev->pdev;
1028         int ret;
1029
1030         dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1031                 band->tuner, band->type, band->index);
1032
1033         if (band->tuner == 0) {
1034                 if (band->index >= ARRAY_SIZE(bands_adc))
1035                         return -EINVAL;
1036
1037                 *band = bands_adc[band->index];
1038                 ret = 0;
1039         } else if (band->tuner == 1 &&
1040                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1041                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1042         } else if (band->tuner == 1) {
1043                 if (band->index >= ARRAY_SIZE(bands_fm))
1044                         return -EINVAL;
1045
1046                 *band = bands_fm[band->index];
1047                 ret = 0;
1048         } else {
1049                 ret = -EINVAL;
1050         }
1051         return ret;
1052 }
1053
1054 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1055                 struct v4l2_frequency *f)
1056 {
1057         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1058         struct platform_device *pdev = dev->pdev;
1059         int ret;
1060
1061         dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1062
1063         if (f->tuner == 0) {
1064                 f->frequency = dev->f_adc;
1065                 f->type = V4L2_TUNER_ADC;
1066                 ret = 0;
1067         } else if (f->tuner == 1 &&
1068                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1069                 f->type = V4L2_TUNER_RF;
1070                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1071         } else if (f->tuner == 1) {
1072                 f->frequency = dev->f_tuner;
1073                 f->type = V4L2_TUNER_RF;
1074                 ret = 0;
1075         } else {
1076                 ret = -EINVAL;
1077         }
1078         return ret;
1079 }
1080
1081 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1082                 const struct v4l2_frequency *f)
1083 {
1084         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1085         struct platform_device *pdev = dev->pdev;
1086         int ret, band;
1087
1088         dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1089                 f->tuner, f->type, f->frequency);
1090
1091         /* ADC band midpoints */
1092         #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1093         #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1094
1095         if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1096                 if (f->frequency < BAND_ADC_0)
1097                         band = 0;
1098                 else if (f->frequency < BAND_ADC_1)
1099                         band = 1;
1100                 else
1101                         band = 2;
1102
1103                 dev->f_adc = clamp_t(unsigned int, f->frequency,
1104                                      bands_adc[band].rangelow,
1105                                      bands_adc[band].rangehigh);
1106
1107                 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1108                 ret = rtl2832_sdr_set_adc(dev);
1109         } else if (f->tuner == 1 &&
1110                    V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1111                 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1112         } else if (f->tuner == 1) {
1113                 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1114                                 bands_fm[0].rangelow,
1115                                 bands_fm[0].rangehigh);
1116                 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1117
1118                 ret = rtl2832_sdr_set_tuner_freq(dev);
1119         } else {
1120                 ret = -EINVAL;
1121         }
1122         return ret;
1123 }
1124
1125 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1126                 struct v4l2_fmtdesc *f)
1127 {
1128         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1129         struct platform_device *pdev = dev->pdev;
1130
1131         dev_dbg(&pdev->dev, "\n");
1132
1133         if (f->index >= dev->num_formats)
1134                 return -EINVAL;
1135
1136         strscpy(f->description, formats[f->index].name, sizeof(f->description));
1137         f->pixelformat = formats[f->index].pixelformat;
1138
1139         return 0;
1140 }
1141
1142 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1143                 struct v4l2_format *f)
1144 {
1145         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1146         struct platform_device *pdev = dev->pdev;
1147
1148         dev_dbg(&pdev->dev, "\n");
1149
1150         f->fmt.sdr.pixelformat = dev->pixelformat;
1151         f->fmt.sdr.buffersize = dev->buffersize;
1152
1153         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1154
1155         return 0;
1156 }
1157
1158 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1159                 struct v4l2_format *f)
1160 {
1161         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1162         struct platform_device *pdev = dev->pdev;
1163         struct vb2_queue *q = &dev->vb_queue;
1164         int i;
1165
1166         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1167                 (char *)&f->fmt.sdr.pixelformat);
1168
1169         if (vb2_is_busy(q))
1170                 return -EBUSY;
1171
1172         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1173         for (i = 0; i < dev->num_formats; i++) {
1174                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1175                         dev->pixelformat = formats[i].pixelformat;
1176                         dev->buffersize = formats[i].buffersize;
1177                         f->fmt.sdr.buffersize = formats[i].buffersize;
1178                         return 0;
1179                 }
1180         }
1181
1182         dev->pixelformat = formats[0].pixelformat;
1183         dev->buffersize = formats[0].buffersize;
1184         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1185         f->fmt.sdr.buffersize = formats[0].buffersize;
1186
1187         return 0;
1188 }
1189
1190 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1191                 struct v4l2_format *f)
1192 {
1193         struct rtl2832_sdr_dev *dev = video_drvdata(file);
1194         struct platform_device *pdev = dev->pdev;
1195         int i;
1196
1197         dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1198                 (char *)&f->fmt.sdr.pixelformat);
1199
1200         memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
1201         for (i = 0; i < dev->num_formats; i++) {
1202                 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1203                         f->fmt.sdr.buffersize = formats[i].buffersize;
1204                         return 0;
1205                 }
1206         }
1207
1208         f->fmt.sdr.pixelformat = formats[0].pixelformat;
1209         f->fmt.sdr.buffersize = formats[0].buffersize;
1210
1211         return 0;
1212 }
1213
1214 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1215         .vidioc_querycap          = rtl2832_sdr_querycap,
1216
1217         .vidioc_enum_fmt_sdr_cap  = rtl2832_sdr_enum_fmt_sdr_cap,
1218         .vidioc_g_fmt_sdr_cap     = rtl2832_sdr_g_fmt_sdr_cap,
1219         .vidioc_s_fmt_sdr_cap     = rtl2832_sdr_s_fmt_sdr_cap,
1220         .vidioc_try_fmt_sdr_cap   = rtl2832_sdr_try_fmt_sdr_cap,
1221
1222         .vidioc_reqbufs           = vb2_ioctl_reqbufs,
1223         .vidioc_create_bufs       = vb2_ioctl_create_bufs,
1224         .vidioc_prepare_buf       = vb2_ioctl_prepare_buf,
1225         .vidioc_querybuf          = vb2_ioctl_querybuf,
1226         .vidioc_qbuf              = vb2_ioctl_qbuf,
1227         .vidioc_dqbuf             = vb2_ioctl_dqbuf,
1228
1229         .vidioc_streamon          = vb2_ioctl_streamon,
1230         .vidioc_streamoff         = vb2_ioctl_streamoff,
1231
1232         .vidioc_g_tuner           = rtl2832_sdr_g_tuner,
1233         .vidioc_s_tuner           = rtl2832_sdr_s_tuner,
1234
1235         .vidioc_enum_freq_bands   = rtl2832_sdr_enum_freq_bands,
1236         .vidioc_g_frequency       = rtl2832_sdr_g_frequency,
1237         .vidioc_s_frequency       = rtl2832_sdr_s_frequency,
1238
1239         .vidioc_subscribe_event   = v4l2_ctrl_subscribe_event,
1240         .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1241         .vidioc_log_status        = v4l2_ctrl_log_status,
1242 };
1243
1244 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1245         .owner                    = THIS_MODULE,
1246         .open                     = v4l2_fh_open,
1247         .release                  = vb2_fop_release,
1248         .read                     = vb2_fop_read,
1249         .poll                     = vb2_fop_poll,
1250         .mmap                     = vb2_fop_mmap,
1251         .unlocked_ioctl           = video_ioctl2,
1252 };
1253
1254 static struct video_device rtl2832_sdr_template = {
1255         .name                     = "Realtek RTL2832 SDR",
1256         .release                  = video_device_release_empty,
1257         .fops                     = &rtl2832_sdr_fops,
1258         .ioctl_ops                = &rtl2832_sdr_ioctl_ops,
1259 };
1260
1261 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1262 {
1263         struct rtl2832_sdr_dev *dev =
1264                         container_of(ctrl->handler, struct rtl2832_sdr_dev,
1265                                         hdl);
1266         struct platform_device *pdev = dev->pdev;
1267         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1268         struct dvb_frontend *fe = pdata->dvb_frontend;
1269         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1270         int ret;
1271
1272         dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1273                 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1274                 ctrl->step);
1275
1276         switch (ctrl->id) {
1277         case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1278         case V4L2_CID_RF_TUNER_BANDWIDTH:
1279                 /* TODO: these controls should be moved to tuner drivers */
1280                 if (dev->bandwidth_auto->val) {
1281                         /* Round towards the closest legal value */
1282                         s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1283                         u32 offset;
1284
1285                         val = clamp_t(s32, val, dev->bandwidth->minimum,
1286                                       dev->bandwidth->maximum);
1287                         offset = val - dev->bandwidth->minimum;
1288                         offset = dev->bandwidth->step *
1289                                 div_u64(offset, dev->bandwidth->step);
1290                         dev->bandwidth->val = dev->bandwidth->minimum + offset;
1291                 }
1292                 c->bandwidth_hz = dev->bandwidth->val;
1293
1294                 if (!test_bit(POWER_ON, &dev->flags))
1295                         return 0;
1296
1297                 if (fe->ops.tuner_ops.set_params)
1298                         ret = fe->ops.tuner_ops.set_params(fe);
1299                 else
1300                         ret = 0;
1301                 break;
1302         default:
1303                 ret = -EINVAL;
1304         }
1305
1306         return ret;
1307 }
1308
1309 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1310         .s_ctrl = rtl2832_sdr_s_ctrl,
1311 };
1312
1313 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1314 {
1315         struct rtl2832_sdr_dev *dev =
1316                         container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1317         struct platform_device *pdev = dev->pdev;
1318
1319         dev_dbg(&pdev->dev, "\n");
1320
1321         v4l2_ctrl_handler_free(&dev->hdl);
1322         v4l2_device_unregister(&dev->v4l2_dev);
1323         kfree(dev);
1324 }
1325
1326 /* Platform driver interface */
1327 static int rtl2832_sdr_probe(struct platform_device *pdev)
1328 {
1329         struct rtl2832_sdr_dev *dev;
1330         struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1331         const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1332         struct v4l2_subdev *subdev;
1333         int ret;
1334
1335         dev_dbg(&pdev->dev, "\n");
1336
1337         if (!pdata) {
1338                 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1339                 ret = -EINVAL;
1340                 goto err;
1341         }
1342         if (!pdev->dev.parent->driver) {
1343                 dev_dbg(&pdev->dev, "No parent device\n");
1344                 ret = -EINVAL;
1345                 goto err;
1346         }
1347         /* try to refcount host drv since we are the consumer */
1348         if (!try_module_get(pdev->dev.parent->driver->owner)) {
1349                 dev_err(&pdev->dev, "Refcount fail");
1350                 ret = -EINVAL;
1351                 goto err;
1352         }
1353         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1354         if (dev == NULL) {
1355                 ret = -ENOMEM;
1356                 goto err_module_put;
1357         }
1358
1359         /* setup the state */
1360         subdev = pdata->v4l2_subdev;
1361         dev->v4l2_subdev = pdata->v4l2_subdev;
1362         dev->pdev = pdev;
1363         dev->regmap = pdata->regmap;
1364         dev->udev = pdata->dvb_usb_device->udev;
1365         dev->f_adc = bands_adc[0].rangelow;
1366         dev->f_tuner = bands_fm[0].rangelow;
1367         dev->pixelformat = formats[0].pixelformat;
1368         dev->buffersize = formats[0].buffersize;
1369         dev->num_formats = NUM_FORMATS;
1370         if (!rtl2832_sdr_emulated_fmt)
1371                 dev->num_formats -= 1;
1372
1373         mutex_init(&dev->v4l2_lock);
1374         mutex_init(&dev->vb_queue_lock);
1375         spin_lock_init(&dev->queued_bufs_lock);
1376         INIT_LIST_HEAD(&dev->queued_bufs);
1377
1378         /* Init videobuf2 queue structure */
1379         dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1380         dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1381         dev->vb_queue.drv_priv = dev;
1382         dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1383         dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1384         dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1385         dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1386         ret = vb2_queue_init(&dev->vb_queue);
1387         if (ret) {
1388                 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1389                 goto err_kfree;
1390         }
1391
1392         /* Register controls */
1393         switch (pdata->tuner) {
1394         case RTL2832_SDR_TUNER_E4000:
1395                 v4l2_ctrl_handler_init(&dev->hdl, 9);
1396                 if (subdev)
1397                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1398                                               NULL, true);
1399                 break;
1400         case RTL2832_SDR_TUNER_R820T:
1401         case RTL2832_SDR_TUNER_R828D:
1402                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1403                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1404                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1405                                                         0, 1, 1, 1);
1406                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1407                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1408                                                    0, 8000000, 100000, 0);
1409                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1410                 break;
1411         case RTL2832_SDR_TUNER_FC0012:
1412         case RTL2832_SDR_TUNER_FC0013:
1413                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1414                 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1415                                                         V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1416                                                         0, 1, 1, 1);
1417                 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1418                                                    V4L2_CID_RF_TUNER_BANDWIDTH,
1419                                                    6000000, 8000000, 1000000,
1420                                                    6000000);
1421                 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1422                 break;
1423         case RTL2832_SDR_TUNER_FC2580:
1424                 v4l2_ctrl_handler_init(&dev->hdl, 2);
1425                 if (subdev)
1426                         v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1427                                               NULL, true);
1428                 break;
1429         default:
1430                 v4l2_ctrl_handler_init(&dev->hdl, 0);
1431                 dev_err(&pdev->dev, "Unsupported tuner\n");
1432                 goto err_v4l2_ctrl_handler_free;
1433         }
1434         if (dev->hdl.error) {
1435                 ret = dev->hdl.error;
1436                 dev_err(&pdev->dev, "Could not initialize controls\n");
1437                 goto err_v4l2_ctrl_handler_free;
1438         }
1439
1440         /* Init video_device structure */
1441         dev->vdev = rtl2832_sdr_template;
1442         dev->vdev.queue = &dev->vb_queue;
1443         dev->vdev.queue->lock = &dev->vb_queue_lock;
1444         video_set_drvdata(&dev->vdev, dev);
1445
1446         /* Register the v4l2_device structure */
1447         dev->v4l2_dev.release = rtl2832_sdr_video_release;
1448         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1449         if (ret) {
1450                 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1451                 goto err_v4l2_ctrl_handler_free;
1452         }
1453
1454         dev->v4l2_dev.ctrl_handler = &dev->hdl;
1455         dev->vdev.v4l2_dev = &dev->v4l2_dev;
1456         dev->vdev.lock = &dev->v4l2_lock;
1457         dev->vdev.vfl_dir = VFL_DIR_RX;
1458
1459         ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1460         if (ret) {
1461                 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1462                         ret);
1463                 goto err_v4l2_device_unregister;
1464         }
1465         dev_info(&pdev->dev, "Registered as %s\n",
1466                  video_device_node_name(&dev->vdev));
1467         dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1468         dev_notice(&pdev->dev,
1469                    "SDR API is still slightly experimental and functionality changes may follow\n");
1470         platform_set_drvdata(pdev, dev);
1471         return 0;
1472 err_v4l2_device_unregister:
1473         v4l2_device_unregister(&dev->v4l2_dev);
1474 err_v4l2_ctrl_handler_free:
1475         v4l2_ctrl_handler_free(&dev->hdl);
1476 err_kfree:
1477         kfree(dev);
1478 err_module_put:
1479         module_put(pdev->dev.parent->driver->owner);
1480 err:
1481         return ret;
1482 }
1483
1484 static int rtl2832_sdr_remove(struct platform_device *pdev)
1485 {
1486         struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1487
1488         dev_dbg(&pdev->dev, "\n");
1489
1490         mutex_lock(&dev->vb_queue_lock);
1491         mutex_lock(&dev->v4l2_lock);
1492         /* No need to keep the urbs around after disconnection */
1493         dev->udev = NULL;
1494         v4l2_device_disconnect(&dev->v4l2_dev);
1495         video_unregister_device(&dev->vdev);
1496         mutex_unlock(&dev->v4l2_lock);
1497         mutex_unlock(&dev->vb_queue_lock);
1498         v4l2_device_put(&dev->v4l2_dev);
1499         module_put(pdev->dev.parent->driver->owner);
1500
1501         return 0;
1502 }
1503
1504 static struct platform_driver rtl2832_sdr_driver = {
1505         .driver = {
1506                 .name   = "rtl2832_sdr",
1507         },
1508         .probe          = rtl2832_sdr_probe,
1509         .remove         = rtl2832_sdr_remove,
1510 };
1511 module_platform_driver(rtl2832_sdr_driver);
1512
1513 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1514 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1515 MODULE_LICENSE("GPL");