1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Realtek RTL2832U SDR driver
4 *
5 * Copyright (C) 2013 Antti Palosaari <crope@iki.fi>
6 *
7 * GNU Radio plugin "gr-kernel" for device usage will be on:
8 * https://git.linuxtv.org/anttip/gr-kernel.git
9 */
10
11 #include "rtl2832_sdr.h"
12 #include "dvb_usb.h"
13
14 #include <media/v4l2-device.h>
15 #include <media/v4l2-ioctl.h>
16 #include <media/v4l2-ctrls.h>
17 #include <media/v4l2-event.h>
18 #include <media/videobuf2-v4l2.h>
19 #include <media/videobuf2-vmalloc.h>
20
21 #include <linux/platform_device.h>
22 #include <linux/jiffies.h>
23 #include <linux/math64.h>
24 #include <linux/regmap.h>
25
26 static bool rtl2832_sdr_emulated_fmt;
27 module_param_named(emulated_formats, rtl2832_sdr_emulated_fmt, bool, 0644);
28 MODULE_PARM_DESC(emulated_formats, "enable emulated formats (disappears in future)");
29
30 /* Original macro does not contain enough null pointer checks for our need */
31 #define V4L2_SUBDEV_HAS_OP(sd, o, f) \
32 ((sd) && (sd)->ops && (sd)->ops->o && (sd)->ops->o->f)
33
34 #define MAX_BULK_BUFS (10)
35 #define BULK_BUFFER_SIZE (128 * 512)
36
37 static const struct v4l2_frequency_band bands_adc[] = {
38 {
39 .tuner = 0,
40 .type = V4L2_TUNER_ADC,
41 .index = 0,
42 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
43 .rangelow = 300000,
44 .rangehigh = 300000,
45 },
46 {
47 .tuner = 0,
48 .type = V4L2_TUNER_ADC,
49 .index = 1,
50 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
51 .rangelow = 900001,
52 .rangehigh = 2800000,
53 },
54 {
55 .tuner = 0,
56 .type = V4L2_TUNER_ADC,
57 .index = 2,
58 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
59 .rangelow = 3200000,
60 .rangehigh = 3200000,
61 },
62 };
63
64 static const struct v4l2_frequency_band bands_fm[] = {
65 {
66 .tuner = 1,
67 .type = V4L2_TUNER_RF,
68 .index = 0,
69 .capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
70 .rangelow = 50000000,
71 .rangehigh = 2000000000,
72 },
73 };
74
75 /* stream formats */
76 struct rtl2832_sdr_format {
77 char *name;
78 u32 pixelformat;
79 u32 buffersize;
80 };
81
82 static struct rtl2832_sdr_format formats[] = {
83 {
84 .pixelformat = V4L2_SDR_FMT_CU8,
85 .buffersize = BULK_BUFFER_SIZE,
86 }, {
87 .pixelformat = V4L2_SDR_FMT_CU16LE,
88 .buffersize = BULK_BUFFER_SIZE * 2,
89 },
90 };
91
92 static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
93
94 /* intermediate buffers with raw data from the USB device */
95 struct rtl2832_sdr_frame_buf {
96 /* common v4l buffer stuff -- must be first */
97 struct vb2_v4l2_buffer vb;
98 struct list_head list;
99 };
100
101 struct rtl2832_sdr_dev {
102 #define POWER_ON 0 /* BIT(0) */
103 #define URB_BUF 1 /* BIT(1) */
104 unsigned long flags;
105
106 struct platform_device *pdev;
107 struct regmap *regmap;
108
109 struct video_device vdev;
110 struct v4l2_device v4l2_dev;
111 struct v4l2_subdev *v4l2_subdev;
112
113 /* videobuf2 queue and queued buffers list */
114 struct vb2_queue vb_queue;
115 struct list_head queued_bufs;
116 spinlock_t queued_bufs_lock; /* Protects queued_bufs */
117 unsigned sequence; /* buffer sequence counter */
118
119 /* Note if taking both locks v4l2_lock must always be locked first! */
120 struct mutex v4l2_lock; /* Protects everything else */
121 struct mutex vb_queue_lock; /* Protects vb_queue and capt_file */
122
123 /* Pointer to our usb_device, will be NULL after unplug */
124 struct usb_device *udev; /* Both mutexes most be hold when setting! */
125
126 unsigned int vb_full; /* vb is full and packets dropped */
127
128 struct urb *urb_list[MAX_BULK_BUFS];
129 int buf_num;
130 unsigned long buf_size;
131 u8 *buf_list[MAX_BULK_BUFS];
132 dma_addr_t dma_addr[MAX_BULK_BUFS];
133 int urbs_initialized;
134 int urbs_submitted;
135
136 unsigned int f_adc, f_tuner;
137 u32 pixelformat;
138 u32 buffersize;
139 unsigned int num_formats;
140
141 /* Controls */
142 struct v4l2_ctrl_handler hdl;
143 struct v4l2_ctrl *bandwidth_auto;
144 struct v4l2_ctrl *bandwidth;
145
146 /* for sample rate calc */
147 unsigned int sample;
148 unsigned int sample_measured;
149 unsigned long jiffies_next;
150 };
151
152 /* Private functions */
rtl2832_sdr_get_next_fill_buf(struct rtl2832_sdr_dev * dev)153 static struct rtl2832_sdr_frame_buf *rtl2832_sdr_get_next_fill_buf(
154 struct rtl2832_sdr_dev *dev)
155 {
156 unsigned long flags;
157 struct rtl2832_sdr_frame_buf *buf = NULL;
158
159 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
160 if (list_empty(&dev->queued_bufs))
161 goto leave;
162
163 buf = list_entry(dev->queued_bufs.next,
164 struct rtl2832_sdr_frame_buf, list);
165 list_del(&buf->list);
166 leave:
167 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
168 return buf;
169 }
170
rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev * dev,void * dst,const u8 * src,unsigned int src_len)171 static unsigned int rtl2832_sdr_convert_stream(struct rtl2832_sdr_dev *dev,
172 void *dst, const u8 *src, unsigned int src_len)
173 {
174 struct platform_device *pdev = dev->pdev;
175 unsigned int dst_len;
176
177 if (dev->pixelformat == V4L2_SDR_FMT_CU8) {
178 /* native stream, no need to convert */
179 memcpy(dst, src, src_len);
180 dst_len = src_len;
181 } else if (dev->pixelformat == V4L2_SDR_FMT_CU16LE) {
182 /* convert u8 to u16 */
183 unsigned int i;
184 u16 *u16dst = dst;
185
186 for (i = 0; i < src_len; i++)
187 *u16dst++ = (src[i] << 8) | (src[i] >> 0);
188 dst_len = 2 * src_len;
189 } else {
190 dst_len = 0;
191 }
192
193 /* calculate sample rate and output it in 10 seconds intervals */
194 if (unlikely(time_is_before_jiffies(dev->jiffies_next))) {
195 #define MSECS 10000UL
196 unsigned int msecs = jiffies_to_msecs(jiffies -
197 dev->jiffies_next + msecs_to_jiffies(MSECS));
198 unsigned int samples = dev->sample - dev->sample_measured;
199
200 dev->jiffies_next = jiffies + msecs_to_jiffies(MSECS);
201 dev->sample_measured = dev->sample;
202 dev_dbg(&pdev->dev,
203 "slen=%u samples=%u msecs=%u sample rate=%lu\n",
204 src_len, samples, msecs, samples * 1000UL / msecs);
205 }
206
207 /* total number of I+Q pairs */
208 dev->sample += src_len / 2;
209
210 return dst_len;
211 }
212
213 /*
214 * This gets called for the bulk stream pipe. This is done in interrupt
215 * time, so it has to be fast, not crash, and not stall. Neat.
216 */
rtl2832_sdr_urb_complete(struct urb * urb)217 static void rtl2832_sdr_urb_complete(struct urb *urb)
218 {
219 struct rtl2832_sdr_dev *dev = urb->context;
220 struct platform_device *pdev = dev->pdev;
221 struct rtl2832_sdr_frame_buf *fbuf;
222
223 dev_dbg_ratelimited(&pdev->dev, "status=%d length=%d/%d errors=%d\n",
224 urb->status, urb->actual_length,
225 urb->transfer_buffer_length, urb->error_count);
226
227 switch (urb->status) {
228 case 0: /* success */
229 case -ETIMEDOUT: /* NAK */
230 break;
231 case -ECONNRESET: /* kill */
232 case -ENOENT:
233 case -ESHUTDOWN:
234 return;
235 default: /* error */
236 dev_err_ratelimited(&pdev->dev, "urb failed=%d\n", urb->status);
237 break;
238 }
239
240 if (likely(urb->actual_length > 0)) {
241 void *ptr;
242 unsigned int len;
243 /* get free framebuffer */
244 fbuf = rtl2832_sdr_get_next_fill_buf(dev);
245 if (unlikely(fbuf == NULL)) {
246 dev->vb_full++;
247 dev_notice_ratelimited(&pdev->dev,
248 "video buffer is full, %d packets dropped\n",
249 dev->vb_full);
250 goto skip;
251 }
252
253 /* fill framebuffer */
254 ptr = vb2_plane_vaddr(&fbuf->vb.vb2_buf, 0);
255 len = rtl2832_sdr_convert_stream(dev, ptr, urb->transfer_buffer,
256 urb->actual_length);
257 vb2_set_plane_payload(&fbuf->vb.vb2_buf, 0, len);
258 fbuf->vb.vb2_buf.timestamp = ktime_get_ns();
259 fbuf->vb.sequence = dev->sequence++;
260 vb2_buffer_done(&fbuf->vb.vb2_buf, VB2_BUF_STATE_DONE);
261 }
262 skip:
263 usb_submit_urb(urb, GFP_ATOMIC);
264 }
265
rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev * dev)266 static int rtl2832_sdr_kill_urbs(struct rtl2832_sdr_dev *dev)
267 {
268 struct platform_device *pdev = dev->pdev;
269 int i;
270
271 for (i = dev->urbs_submitted - 1; i >= 0; i--) {
272 dev_dbg(&pdev->dev, "kill urb=%d\n", i);
273 /* stop the URB */
274 usb_kill_urb(dev->urb_list[i]);
275 }
276 dev->urbs_submitted = 0;
277
278 return 0;
279 }
280
rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev * dev)281 static int rtl2832_sdr_submit_urbs(struct rtl2832_sdr_dev *dev)
282 {
283 struct platform_device *pdev = dev->pdev;
284 int i, ret;
285
286 for (i = 0; i < dev->urbs_initialized; i++) {
287 dev_dbg(&pdev->dev, "submit urb=%d\n", i);
288 ret = usb_submit_urb(dev->urb_list[i], GFP_KERNEL);
289 if (ret) {
290 dev_err(&pdev->dev,
291 "Could not submit urb no. %d - get them all back\n",
292 i);
293 rtl2832_sdr_kill_urbs(dev);
294 return ret;
295 }
296 dev->urbs_submitted++;
297 }
298
299 return 0;
300 }
301
rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev * dev)302 static int rtl2832_sdr_free_stream_bufs(struct rtl2832_sdr_dev *dev)
303 {
304 struct platform_device *pdev = dev->pdev;
305
306 if (test_bit(URB_BUF, &dev->flags)) {
307 while (dev->buf_num) {
308 dev->buf_num--;
309 dev_dbg(&pdev->dev, "free buf=%d\n", dev->buf_num);
310 usb_free_coherent(dev->udev, dev->buf_size,
311 dev->buf_list[dev->buf_num],
312 dev->dma_addr[dev->buf_num]);
313 }
314 }
315 clear_bit(URB_BUF, &dev->flags);
316
317 return 0;
318 }
319
rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev * dev)320 static int rtl2832_sdr_alloc_stream_bufs(struct rtl2832_sdr_dev *dev)
321 {
322 struct platform_device *pdev = dev->pdev;
323
324 dev->buf_num = 0;
325 dev->buf_size = BULK_BUFFER_SIZE;
326
327 dev_dbg(&pdev->dev, "all in all I will use %u bytes for streaming\n",
328 MAX_BULK_BUFS * BULK_BUFFER_SIZE);
329
330 for (dev->buf_num = 0; dev->buf_num < MAX_BULK_BUFS; dev->buf_num++) {
331 dev->buf_list[dev->buf_num] = usb_alloc_coherent(dev->udev,
332 BULK_BUFFER_SIZE, GFP_KERNEL,
333 &dev->dma_addr[dev->buf_num]);
334 if (!dev->buf_list[dev->buf_num]) {
335 dev_dbg(&pdev->dev, "alloc buf=%d failed\n",
336 dev->buf_num);
337 rtl2832_sdr_free_stream_bufs(dev);
338 return -ENOMEM;
339 }
340
341 dev_dbg(&pdev->dev, "alloc buf=%d %p (dma %llu)\n",
342 dev->buf_num, dev->buf_list[dev->buf_num],
343 (long long)dev->dma_addr[dev->buf_num]);
344 set_bit(URB_BUF, &dev->flags);
345 }
346
347 return 0;
348 }
349
rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev * dev)350 static int rtl2832_sdr_free_urbs(struct rtl2832_sdr_dev *dev)
351 {
352 struct platform_device *pdev = dev->pdev;
353 int i;
354
355 rtl2832_sdr_kill_urbs(dev);
356
357 for (i = dev->urbs_initialized - 1; i >= 0; i--) {
358 if (dev->urb_list[i]) {
359 dev_dbg(&pdev->dev, "free urb=%d\n", i);
360 /* free the URBs */
361 usb_free_urb(dev->urb_list[i]);
362 }
363 }
364 dev->urbs_initialized = 0;
365
366 return 0;
367 }
368
rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev * dev)369 static int rtl2832_sdr_alloc_urbs(struct rtl2832_sdr_dev *dev)
370 {
371 struct platform_device *pdev = dev->pdev;
372 int i, j;
373
374 /* allocate the URBs */
375 for (i = 0; i < MAX_BULK_BUFS; i++) {
376 dev_dbg(&pdev->dev, "alloc urb=%d\n", i);
377 dev->urb_list[i] = usb_alloc_urb(0, GFP_KERNEL);
378 if (!dev->urb_list[i]) {
379 for (j = 0; j < i; j++) {
380 usb_free_urb(dev->urb_list[j]);
381 dev->urb_list[j] = NULL;
382 }
383 dev->urbs_initialized = 0;
384 return -ENOMEM;
385 }
386 usb_fill_bulk_urb(dev->urb_list[i],
387 dev->udev,
388 usb_rcvbulkpipe(dev->udev, 0x81),
389 dev->buf_list[i],
390 BULK_BUFFER_SIZE,
391 rtl2832_sdr_urb_complete, dev);
392
393 dev->urb_list[i]->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
394 dev->urb_list[i]->transfer_dma = dev->dma_addr[i];
395 dev->urbs_initialized++;
396 }
397
398 return 0;
399 }
400
401 /* Must be called with vb_queue_lock hold */
rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev * dev)402 static void rtl2832_sdr_cleanup_queued_bufs(struct rtl2832_sdr_dev *dev)
403 {
404 struct platform_device *pdev = dev->pdev;
405 unsigned long flags;
406
407 dev_dbg(&pdev->dev, "\n");
408
409 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
410 while (!list_empty(&dev->queued_bufs)) {
411 struct rtl2832_sdr_frame_buf *buf;
412
413 buf = list_entry(dev->queued_bufs.next,
414 struct rtl2832_sdr_frame_buf, list);
415 list_del(&buf->list);
416 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
417 }
418 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
419 }
420
rtl2832_sdr_querycap(struct file * file,void * fh,struct v4l2_capability * cap)421 static int rtl2832_sdr_querycap(struct file *file, void *fh,
422 struct v4l2_capability *cap)
423 {
424 struct rtl2832_sdr_dev *dev = video_drvdata(file);
425 struct platform_device *pdev = dev->pdev;
426
427 dev_dbg(&pdev->dev, "\n");
428
429 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
430 strscpy(cap->card, dev->vdev.name, sizeof(cap->card));
431 usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info));
432 return 0;
433 }
434
435 /* Videobuf2 operations */
rtl2832_sdr_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])436 static int rtl2832_sdr_queue_setup(struct vb2_queue *vq,
437 unsigned int *nbuffers,
438 unsigned int *nplanes, unsigned int sizes[], struct device *alloc_devs[])
439 {
440 struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
441 struct platform_device *pdev = dev->pdev;
442
443 dev_dbg(&pdev->dev, "nbuffers=%d\n", *nbuffers);
444
445 /* Need at least 8 buffers */
446 if (vq->num_buffers + *nbuffers < 8)
447 *nbuffers = 8 - vq->num_buffers;
448 *nplanes = 1;
449 sizes[0] = PAGE_ALIGN(dev->buffersize);
450 dev_dbg(&pdev->dev, "nbuffers=%d sizes[0]=%d\n", *nbuffers, sizes[0]);
451 return 0;
452 }
453
rtl2832_sdr_buf_prepare(struct vb2_buffer * vb)454 static int rtl2832_sdr_buf_prepare(struct vb2_buffer *vb)
455 {
456 struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
457
458 /* Don't allow queueing new buffers after device disconnection */
459 if (!dev->udev)
460 return -ENODEV;
461
462 return 0;
463 }
464
rtl2832_sdr_buf_queue(struct vb2_buffer * vb)465 static void rtl2832_sdr_buf_queue(struct vb2_buffer *vb)
466 {
467 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
468 struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
469 struct rtl2832_sdr_frame_buf *buf =
470 container_of(vbuf, struct rtl2832_sdr_frame_buf, vb);
471 unsigned long flags;
472
473 /* Check the device has not disconnected between prep and queuing */
474 if (!dev->udev) {
475 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
476 return;
477 }
478
479 spin_lock_irqsave(&dev->queued_bufs_lock, flags);
480 list_add_tail(&buf->list, &dev->queued_bufs);
481 spin_unlock_irqrestore(&dev->queued_bufs_lock, flags);
482 }
483
rtl2832_sdr_set_adc(struct rtl2832_sdr_dev * dev)484 static int rtl2832_sdr_set_adc(struct rtl2832_sdr_dev *dev)
485 {
486 struct platform_device *pdev = dev->pdev;
487 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
488 struct dvb_frontend *fe = pdata->dvb_frontend;
489 int ret;
490 unsigned int f_sr, f_if;
491 u8 buf[4], u8tmp1, u8tmp2;
492 u64 u64tmp;
493 u32 u32tmp;
494
495 dev_dbg(&pdev->dev, "f_adc=%u\n", dev->f_adc);
496
497 if (!test_bit(POWER_ON, &dev->flags))
498 return 0;
499
500 if (dev->f_adc == 0)
501 return 0;
502
503 f_sr = dev->f_adc;
504
505 ret = regmap_bulk_write(dev->regmap, 0x13e, "\x00\x00", 2);
506 if (ret)
507 goto err;
508
509 ret = regmap_bulk_write(dev->regmap, 0x115, "\x00\x00\x00\x00", 4);
510 if (ret)
511 goto err;
512
513 /* get IF from tuner */
514 if (fe->ops.tuner_ops.get_if_frequency)
515 ret = fe->ops.tuner_ops.get_if_frequency(fe, &f_if);
516 else
517 ret = -EINVAL;
518
519 if (ret)
520 goto err;
521
522 /* program IF */
523 u64tmp = f_if % pdata->clk;
524 u64tmp *= 0x400000;
525 u64tmp = div_u64(u64tmp, pdata->clk);
526 u64tmp = -u64tmp;
527 u32tmp = u64tmp & 0x3fffff;
528
529 dev_dbg(&pdev->dev, "f_if=%u if_ctl=%08x\n", f_if, u32tmp);
530
531 buf[0] = (u32tmp >> 16) & 0xff;
532 buf[1] = (u32tmp >> 8) & 0xff;
533 buf[2] = (u32tmp >> 0) & 0xff;
534
535 ret = regmap_bulk_write(dev->regmap, 0x119, buf, 3);
536 if (ret)
537 goto err;
538
539 /* BB / IF mode */
540 /* POR: 0x1b1=0x1f, 0x008=0x0d, 0x006=0x80 */
541 if (f_if) {
542 u8tmp1 = 0x1a; /* disable Zero-IF */
543 u8tmp2 = 0x8d; /* enable ADC I */
544 } else {
545 u8tmp1 = 0x1b; /* enable Zero-IF, DC, IQ */
546 u8tmp2 = 0xcd; /* enable ADC I, ADC Q */
547 }
548
549 ret = regmap_write(dev->regmap, 0x1b1, u8tmp1);
550 if (ret)
551 goto err;
552
553 ret = regmap_write(dev->regmap, 0x008, u8tmp2);
554 if (ret)
555 goto err;
556
557 ret = regmap_write(dev->regmap, 0x006, 0x80);
558 if (ret)
559 goto err;
560
561 /* program sampling rate (resampling down) */
562 u32tmp = div_u64(pdata->clk * 0x400000ULL, f_sr * 4U);
563 u32tmp <<= 2;
564 buf[0] = (u32tmp >> 24) & 0xff;
565 buf[1] = (u32tmp >> 16) & 0xff;
566 buf[2] = (u32tmp >> 8) & 0xff;
567 buf[3] = (u32tmp >> 0) & 0xff;
568 ret = regmap_bulk_write(dev->regmap, 0x19f, buf, 4);
569 if (ret)
570 goto err;
571
572 /* low-pass filter */
573 ret = regmap_bulk_write(dev->regmap, 0x11c,
574 "\xca\xdc\xd7\xd8\xe0\xf2\x0e\x35\x06\x50\x9c\x0d\x71\x11\x14\x71\x74\x19\x41\xa5",
575 20);
576 if (ret)
577 goto err;
578
579 ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
580 if (ret)
581 goto err;
582
583 /* mode */
584 ret = regmap_write(dev->regmap, 0x019, 0x05);
585 if (ret)
586 goto err;
587
588 ret = regmap_bulk_write(dev->regmap, 0x01a,
589 "\x1b\x16\x0d\x06\x01\xff", 6);
590 if (ret)
591 goto err;
592
593 /* FSM */
594 ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\xf0\x0f", 3);
595 if (ret)
596 goto err;
597
598 /* PID filter */
599 ret = regmap_write(dev->regmap, 0x061, 0x60);
600 if (ret)
601 goto err;
602
603 /* used RF tuner based settings */
604 switch (pdata->tuner) {
605 case RTL2832_SDR_TUNER_E4000:
606 ret = regmap_write(dev->regmap, 0x112, 0x5a);
607 ret = regmap_write(dev->regmap, 0x102, 0x40);
608 ret = regmap_write(dev->regmap, 0x103, 0x5a);
609 ret = regmap_write(dev->regmap, 0x1c7, 0x30);
610 ret = regmap_write(dev->regmap, 0x104, 0xd0);
611 ret = regmap_write(dev->regmap, 0x105, 0xbe);
612 ret = regmap_write(dev->regmap, 0x1c8, 0x18);
613 ret = regmap_write(dev->regmap, 0x106, 0x35);
614 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
615 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
616 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
617 ret = regmap_write(dev->regmap, 0x107, 0x40);
618 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
619 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
620 ret = regmap_write(dev->regmap, 0x108, 0x80);
621 ret = regmap_write(dev->regmap, 0x109, 0x7f);
622 ret = regmap_write(dev->regmap, 0x10a, 0x80);
623 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
624 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
625 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
626 ret = regmap_write(dev->regmap, 0x011, 0xd4);
627 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
628 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
629 ret = regmap_write(dev->regmap, 0x1db, 0x00);
630 ret = regmap_write(dev->regmap, 0x1dd, 0x14);
631 ret = regmap_write(dev->regmap, 0x1de, 0xec);
632 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
633 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
634 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
635 ret = regmap_write(dev->regmap, 0x00d, 0x83);
636 ret = regmap_write(dev->regmap, 0x010, 0x49);
637 ret = regmap_write(dev->regmap, 0x00d, 0x87);
638 ret = regmap_write(dev->regmap, 0x00d, 0x85);
639 ret = regmap_write(dev->regmap, 0x013, 0x02);
640 break;
641 case RTL2832_SDR_TUNER_FC0012:
642 case RTL2832_SDR_TUNER_FC0013:
643 ret = regmap_write(dev->regmap, 0x112, 0x5a);
644 ret = regmap_write(dev->regmap, 0x102, 0x40);
645 ret = regmap_write(dev->regmap, 0x103, 0x5a);
646 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
647 ret = regmap_write(dev->regmap, 0x104, 0xcc);
648 ret = regmap_write(dev->regmap, 0x105, 0xbe);
649 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
650 ret = regmap_write(dev->regmap, 0x106, 0x35);
651 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
652 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
653 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
654 ret = regmap_write(dev->regmap, 0x107, 0x40);
655 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
656 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
657 ret = regmap_write(dev->regmap, 0x108, 0x80);
658 ret = regmap_write(dev->regmap, 0x109, 0x7f);
659 ret = regmap_write(dev->regmap, 0x10a, 0x80);
660 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
661 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
662 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
663 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xbf", 2);
664 ret = regmap_write(dev->regmap, 0x1e5, 0xf0);
665 ret = regmap_write(dev->regmap, 0x1d9, 0x00);
666 ret = regmap_write(dev->regmap, 0x1db, 0x00);
667 ret = regmap_write(dev->regmap, 0x1dd, 0x11);
668 ret = regmap_write(dev->regmap, 0x1de, 0xef);
669 ret = regmap_write(dev->regmap, 0x1d8, 0x0c);
670 ret = regmap_write(dev->regmap, 0x1e6, 0x02);
671 ret = regmap_write(dev->regmap, 0x1d7, 0x09);
672 break;
673 case RTL2832_SDR_TUNER_R820T:
674 case RTL2832_SDR_TUNER_R828D:
675 ret = regmap_write(dev->regmap, 0x112, 0x5a);
676 ret = regmap_write(dev->regmap, 0x102, 0x40);
677 ret = regmap_write(dev->regmap, 0x115, 0x01);
678 ret = regmap_write(dev->regmap, 0x103, 0x80);
679 ret = regmap_write(dev->regmap, 0x1c7, 0x24);
680 ret = regmap_write(dev->regmap, 0x104, 0xcc);
681 ret = regmap_write(dev->regmap, 0x105, 0xbe);
682 ret = regmap_write(dev->regmap, 0x1c8, 0x14);
683 ret = regmap_write(dev->regmap, 0x106, 0x35);
684 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
685 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
686 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
687 ret = regmap_write(dev->regmap, 0x107, 0x40);
688 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
689 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
690 ret = regmap_write(dev->regmap, 0x108, 0x80);
691 ret = regmap_write(dev->regmap, 0x109, 0x7f);
692 ret = regmap_write(dev->regmap, 0x10a, 0x80);
693 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
694 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
695 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
696 ret = regmap_write(dev->regmap, 0x011, 0xf4);
697 break;
698 case RTL2832_SDR_TUNER_FC2580:
699 ret = regmap_write(dev->regmap, 0x112, 0x39);
700 ret = regmap_write(dev->regmap, 0x102, 0x40);
701 ret = regmap_write(dev->regmap, 0x103, 0x5a);
702 ret = regmap_write(dev->regmap, 0x1c7, 0x2c);
703 ret = regmap_write(dev->regmap, 0x104, 0xcc);
704 ret = regmap_write(dev->regmap, 0x105, 0xbe);
705 ret = regmap_write(dev->regmap, 0x1c8, 0x16);
706 ret = regmap_write(dev->regmap, 0x106, 0x35);
707 ret = regmap_write(dev->regmap, 0x1c9, 0x21);
708 ret = regmap_write(dev->regmap, 0x1ca, 0x21);
709 ret = regmap_write(dev->regmap, 0x1cb, 0x00);
710 ret = regmap_write(dev->regmap, 0x107, 0x40);
711 ret = regmap_write(dev->regmap, 0x1cd, 0x10);
712 ret = regmap_write(dev->regmap, 0x1ce, 0x10);
713 ret = regmap_write(dev->regmap, 0x108, 0x80);
714 ret = regmap_write(dev->regmap, 0x109, 0x7f);
715 ret = regmap_write(dev->regmap, 0x10a, 0x9c);
716 ret = regmap_write(dev->regmap, 0x10b, 0x7f);
717 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
718 ret = regmap_write(dev->regmap, 0x00e, 0xfc);
719 ret = regmap_bulk_write(dev->regmap, 0x011, "\xe9\xf4", 2);
720 break;
721 default:
722 dev_notice(&pdev->dev, "Unsupported tuner\n");
723 }
724
725 /* software reset */
726 ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x04);
727 if (ret)
728 goto err;
729
730 ret = regmap_update_bits(dev->regmap, 0x101, 0x04, 0x00);
731 if (ret)
732 goto err;
733 err:
734 return ret;
735 };
736
rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev * dev)737 static void rtl2832_sdr_unset_adc(struct rtl2832_sdr_dev *dev)
738 {
739 struct platform_device *pdev = dev->pdev;
740 int ret;
741
742 dev_dbg(&pdev->dev, "\n");
743
744 /* PID filter */
745 ret = regmap_write(dev->regmap, 0x061, 0xe0);
746 if (ret)
747 goto err;
748
749 /* mode */
750 ret = regmap_write(dev->regmap, 0x019, 0x20);
751 if (ret)
752 goto err;
753
754 ret = regmap_bulk_write(dev->regmap, 0x017, "\x11\x10", 2);
755 if (ret)
756 goto err;
757
758 /* FSM */
759 ret = regmap_bulk_write(dev->regmap, 0x192, "\x00\x0f\xff", 3);
760 if (ret)
761 goto err;
762
763 ret = regmap_bulk_write(dev->regmap, 0x13e, "\x40\x00", 2);
764 if (ret)
765 goto err;
766
767 ret = regmap_bulk_write(dev->regmap, 0x115, "\x06\x3f\xce\xcc", 4);
768 if (ret)
769 goto err;
770 err:
771 return;
772 };
773
rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev * dev)774 static int rtl2832_sdr_set_tuner_freq(struct rtl2832_sdr_dev *dev)
775 {
776 struct platform_device *pdev = dev->pdev;
777 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
778 struct dvb_frontend *fe = pdata->dvb_frontend;
779 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
780 struct v4l2_ctrl *bandwidth_auto;
781 struct v4l2_ctrl *bandwidth;
782
783 /*
784 * tuner RF (Hz)
785 */
786 if (dev->f_tuner == 0)
787 return 0;
788
789 /*
790 * bandwidth (Hz)
791 */
792 bandwidth_auto = v4l2_ctrl_find(&dev->hdl,
793 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO);
794 bandwidth = v4l2_ctrl_find(&dev->hdl, V4L2_CID_RF_TUNER_BANDWIDTH);
795 if (v4l2_ctrl_g_ctrl(bandwidth_auto)) {
796 c->bandwidth_hz = dev->f_adc;
797 v4l2_ctrl_s_ctrl(bandwidth, dev->f_adc);
798 } else {
799 c->bandwidth_hz = v4l2_ctrl_g_ctrl(bandwidth);
800 }
801
802 c->frequency = dev->f_tuner;
803 c->delivery_system = SYS_DVBT;
804
805 dev_dbg(&pdev->dev, "frequency=%u bandwidth=%d\n",
806 c->frequency, c->bandwidth_hz);
807
808 if (!test_bit(POWER_ON, &dev->flags))
809 return 0;
810
811 if (!V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
812 if (fe->ops.tuner_ops.set_params)
813 fe->ops.tuner_ops.set_params(fe);
814 }
815
816 return 0;
817 };
818
rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev * dev)819 static int rtl2832_sdr_set_tuner(struct rtl2832_sdr_dev *dev)
820 {
821 struct platform_device *pdev = dev->pdev;
822 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
823 struct dvb_frontend *fe = pdata->dvb_frontend;
824
825 dev_dbg(&pdev->dev, "\n");
826
827 if (fe->ops.tuner_ops.init)
828 fe->ops.tuner_ops.init(fe);
829
830 return 0;
831 };
832
rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev * dev)833 static void rtl2832_sdr_unset_tuner(struct rtl2832_sdr_dev *dev)
834 {
835 struct platform_device *pdev = dev->pdev;
836 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
837 struct dvb_frontend *fe = pdata->dvb_frontend;
838
839 dev_dbg(&pdev->dev, "\n");
840
841 if (fe->ops.tuner_ops.sleep)
842 fe->ops.tuner_ops.sleep(fe);
843
844 return;
845 };
846
rtl2832_sdr_start_streaming(struct vb2_queue * vq,unsigned int count)847 static int rtl2832_sdr_start_streaming(struct vb2_queue *vq, unsigned int count)
848 {
849 struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
850 struct platform_device *pdev = dev->pdev;
851 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
852 struct dvb_usb_device *d = pdata->dvb_usb_device;
853 int ret;
854
855 dev_dbg(&pdev->dev, "\n");
856
857 if (!dev->udev)
858 return -ENODEV;
859
860 if (mutex_lock_interruptible(&dev->v4l2_lock))
861 return -ERESTARTSYS;
862
863 if (d->props->power_ctrl)
864 d->props->power_ctrl(d, 1);
865
866 /* enable ADC */
867 if (d->props->frontend_ctrl)
868 d->props->frontend_ctrl(pdata->dvb_frontend, 1);
869
870 set_bit(POWER_ON, &dev->flags);
871
872 /* wake-up tuner */
873 if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
874 ret = v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 1);
875 else
876 ret = rtl2832_sdr_set_tuner(dev);
877 if (ret)
878 goto err;
879
880 ret = rtl2832_sdr_set_tuner_freq(dev);
881 if (ret)
882 goto err;
883
884 ret = rtl2832_sdr_set_adc(dev);
885 if (ret)
886 goto err;
887
888 ret = rtl2832_sdr_alloc_stream_bufs(dev);
889 if (ret)
890 goto err;
891
892 ret = rtl2832_sdr_alloc_urbs(dev);
893 if (ret)
894 goto err;
895
896 dev->sequence = 0;
897
898 ret = rtl2832_sdr_submit_urbs(dev);
899 if (ret)
900 goto err;
901
902 err:
903 mutex_unlock(&dev->v4l2_lock);
904
905 return ret;
906 }
907
rtl2832_sdr_stop_streaming(struct vb2_queue * vq)908 static void rtl2832_sdr_stop_streaming(struct vb2_queue *vq)
909 {
910 struct rtl2832_sdr_dev *dev = vb2_get_drv_priv(vq);
911 struct platform_device *pdev = dev->pdev;
912 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
913 struct dvb_usb_device *d = pdata->dvb_usb_device;
914
915 dev_dbg(&pdev->dev, "\n");
916
917 mutex_lock(&dev->v4l2_lock);
918
919 rtl2832_sdr_kill_urbs(dev);
920 rtl2832_sdr_free_urbs(dev);
921 rtl2832_sdr_free_stream_bufs(dev);
922 rtl2832_sdr_cleanup_queued_bufs(dev);
923 rtl2832_sdr_unset_adc(dev);
924
925 /* sleep tuner */
926 if (V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, core, s_power))
927 v4l2_subdev_call(dev->v4l2_subdev, core, s_power, 0);
928 else
929 rtl2832_sdr_unset_tuner(dev);
930
931 clear_bit(POWER_ON, &dev->flags);
932
933 /* disable ADC */
934 if (d->props->frontend_ctrl)
935 d->props->frontend_ctrl(pdata->dvb_frontend, 0);
936
937 if (d->props->power_ctrl)
938 d->props->power_ctrl(d, 0);
939
940 mutex_unlock(&dev->v4l2_lock);
941 }
942
943 static const struct vb2_ops rtl2832_sdr_vb2_ops = {
944 .queue_setup = rtl2832_sdr_queue_setup,
945 .buf_prepare = rtl2832_sdr_buf_prepare,
946 .buf_queue = rtl2832_sdr_buf_queue,
947 .start_streaming = rtl2832_sdr_start_streaming,
948 .stop_streaming = rtl2832_sdr_stop_streaming,
949 .wait_prepare = vb2_ops_wait_prepare,
950 .wait_finish = vb2_ops_wait_finish,
951 };
952
rtl2832_sdr_g_tuner(struct file * file,void * priv,struct v4l2_tuner * v)953 static int rtl2832_sdr_g_tuner(struct file *file, void *priv,
954 struct v4l2_tuner *v)
955 {
956 struct rtl2832_sdr_dev *dev = video_drvdata(file);
957 struct platform_device *pdev = dev->pdev;
958 int ret;
959
960 dev_dbg(&pdev->dev, "index=%d type=%d\n", v->index, v->type);
961
962 if (v->index == 0) {
963 strscpy(v->name, "ADC: Realtek RTL2832", sizeof(v->name));
964 v->type = V4L2_TUNER_ADC;
965 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
966 v->rangelow = 300000;
967 v->rangehigh = 3200000;
968 ret = 0;
969 } else if (v->index == 1 &&
970 V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_tuner)) {
971 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_tuner, v);
972 } else if (v->index == 1) {
973 strscpy(v->name, "RF: <unknown>", sizeof(v->name));
974 v->type = V4L2_TUNER_RF;
975 v->capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS;
976 v->rangelow = 50000000;
977 v->rangehigh = 2000000000;
978 ret = 0;
979 } else {
980 ret = -EINVAL;
981 }
982 return ret;
983 }
984
rtl2832_sdr_s_tuner(struct file * file,void * priv,const struct v4l2_tuner * v)985 static int rtl2832_sdr_s_tuner(struct file *file, void *priv,
986 const struct v4l2_tuner *v)
987 {
988 struct rtl2832_sdr_dev *dev = video_drvdata(file);
989 struct platform_device *pdev = dev->pdev;
990 int ret;
991
992 dev_dbg(&pdev->dev, "\n");
993
994 if (v->index == 0) {
995 ret = 0;
996 } else if (v->index == 1 &&
997 V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_tuner)) {
998 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_tuner, v);
999 } else if (v->index == 1) {
1000 ret = 0;
1001 } else {
1002 ret = -EINVAL;
1003 }
1004 return ret;
1005 }
1006
rtl2832_sdr_enum_freq_bands(struct file * file,void * priv,struct v4l2_frequency_band * band)1007 static int rtl2832_sdr_enum_freq_bands(struct file *file, void *priv,
1008 struct v4l2_frequency_band *band)
1009 {
1010 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1011 struct platform_device *pdev = dev->pdev;
1012 int ret;
1013
1014 dev_dbg(&pdev->dev, "tuner=%d type=%d index=%d\n",
1015 band->tuner, band->type, band->index);
1016
1017 if (band->tuner == 0) {
1018 if (band->index >= ARRAY_SIZE(bands_adc))
1019 return -EINVAL;
1020
1021 *band = bands_adc[band->index];
1022 ret = 0;
1023 } else if (band->tuner == 1 &&
1024 V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, enum_freq_bands)) {
1025 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, enum_freq_bands, band);
1026 } else if (band->tuner == 1) {
1027 if (band->index >= ARRAY_SIZE(bands_fm))
1028 return -EINVAL;
1029
1030 *band = bands_fm[band->index];
1031 ret = 0;
1032 } else {
1033 ret = -EINVAL;
1034 }
1035 return ret;
1036 }
1037
rtl2832_sdr_g_frequency(struct file * file,void * priv,struct v4l2_frequency * f)1038 static int rtl2832_sdr_g_frequency(struct file *file, void *priv,
1039 struct v4l2_frequency *f)
1040 {
1041 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1042 struct platform_device *pdev = dev->pdev;
1043 int ret;
1044
1045 dev_dbg(&pdev->dev, "tuner=%d type=%d\n", f->tuner, f->type);
1046
1047 if (f->tuner == 0) {
1048 f->frequency = dev->f_adc;
1049 f->type = V4L2_TUNER_ADC;
1050 ret = 0;
1051 } else if (f->tuner == 1 &&
1052 V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, g_frequency)) {
1053 f->type = V4L2_TUNER_RF;
1054 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, g_frequency, f);
1055 } else if (f->tuner == 1) {
1056 f->frequency = dev->f_tuner;
1057 f->type = V4L2_TUNER_RF;
1058 ret = 0;
1059 } else {
1060 ret = -EINVAL;
1061 }
1062 return ret;
1063 }
1064
rtl2832_sdr_s_frequency(struct file * file,void * priv,const struct v4l2_frequency * f)1065 static int rtl2832_sdr_s_frequency(struct file *file, void *priv,
1066 const struct v4l2_frequency *f)
1067 {
1068 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1069 struct platform_device *pdev = dev->pdev;
1070 int ret, band;
1071
1072 dev_dbg(&pdev->dev, "tuner=%d type=%d frequency=%u\n",
1073 f->tuner, f->type, f->frequency);
1074
1075 /* ADC band midpoints */
1076 #define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
1077 #define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
1078
1079 if (f->tuner == 0 && f->type == V4L2_TUNER_ADC) {
1080 if (f->frequency < BAND_ADC_0)
1081 band = 0;
1082 else if (f->frequency < BAND_ADC_1)
1083 band = 1;
1084 else
1085 band = 2;
1086
1087 dev->f_adc = clamp_t(unsigned int, f->frequency,
1088 bands_adc[band].rangelow,
1089 bands_adc[band].rangehigh);
1090
1091 dev_dbg(&pdev->dev, "ADC frequency=%u Hz\n", dev->f_adc);
1092 ret = rtl2832_sdr_set_adc(dev);
1093 } else if (f->tuner == 1 &&
1094 V4L2_SUBDEV_HAS_OP(dev->v4l2_subdev, tuner, s_frequency)) {
1095 ret = v4l2_subdev_call(dev->v4l2_subdev, tuner, s_frequency, f);
1096 } else if (f->tuner == 1) {
1097 dev->f_tuner = clamp_t(unsigned int, f->frequency,
1098 bands_fm[0].rangelow,
1099 bands_fm[0].rangehigh);
1100 dev_dbg(&pdev->dev, "RF frequency=%u Hz\n", f->frequency);
1101
1102 ret = rtl2832_sdr_set_tuner_freq(dev);
1103 } else {
1104 ret = -EINVAL;
1105 }
1106 return ret;
1107 }
1108
rtl2832_sdr_enum_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)1109 static int rtl2832_sdr_enum_fmt_sdr_cap(struct file *file, void *priv,
1110 struct v4l2_fmtdesc *f)
1111 {
1112 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1113 struct platform_device *pdev = dev->pdev;
1114
1115 dev_dbg(&pdev->dev, "\n");
1116
1117 if (f->index >= dev->num_formats)
1118 return -EINVAL;
1119
1120 f->pixelformat = formats[f->index].pixelformat;
1121
1122 return 0;
1123 }
1124
rtl2832_sdr_g_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)1125 static int rtl2832_sdr_g_fmt_sdr_cap(struct file *file, void *priv,
1126 struct v4l2_format *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 f->fmt.sdr.pixelformat = dev->pixelformat;
1134 f->fmt.sdr.buffersize = dev->buffersize;
1135
1136 return 0;
1137 }
1138
rtl2832_sdr_s_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)1139 static int rtl2832_sdr_s_fmt_sdr_cap(struct file *file, void *priv,
1140 struct v4l2_format *f)
1141 {
1142 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1143 struct platform_device *pdev = dev->pdev;
1144 struct vb2_queue *q = &dev->vb_queue;
1145 int i;
1146
1147 dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1148 (char *)&f->fmt.sdr.pixelformat);
1149
1150 if (vb2_is_busy(q))
1151 return -EBUSY;
1152
1153 for (i = 0; i < dev->num_formats; i++) {
1154 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1155 dev->pixelformat = formats[i].pixelformat;
1156 dev->buffersize = formats[i].buffersize;
1157 f->fmt.sdr.buffersize = formats[i].buffersize;
1158 return 0;
1159 }
1160 }
1161
1162 dev->pixelformat = formats[0].pixelformat;
1163 dev->buffersize = formats[0].buffersize;
1164 f->fmt.sdr.pixelformat = formats[0].pixelformat;
1165 f->fmt.sdr.buffersize = formats[0].buffersize;
1166
1167 return 0;
1168 }
1169
rtl2832_sdr_try_fmt_sdr_cap(struct file * file,void * priv,struct v4l2_format * f)1170 static int rtl2832_sdr_try_fmt_sdr_cap(struct file *file, void *priv,
1171 struct v4l2_format *f)
1172 {
1173 struct rtl2832_sdr_dev *dev = video_drvdata(file);
1174 struct platform_device *pdev = dev->pdev;
1175 int i;
1176
1177 dev_dbg(&pdev->dev, "pixelformat fourcc %4.4s\n",
1178 (char *)&f->fmt.sdr.pixelformat);
1179
1180 for (i = 0; i < dev->num_formats; i++) {
1181 if (formats[i].pixelformat == f->fmt.sdr.pixelformat) {
1182 f->fmt.sdr.buffersize = formats[i].buffersize;
1183 return 0;
1184 }
1185 }
1186
1187 f->fmt.sdr.pixelformat = formats[0].pixelformat;
1188 f->fmt.sdr.buffersize = formats[0].buffersize;
1189
1190 return 0;
1191 }
1192
1193 static const struct v4l2_ioctl_ops rtl2832_sdr_ioctl_ops = {
1194 .vidioc_querycap = rtl2832_sdr_querycap,
1195
1196 .vidioc_enum_fmt_sdr_cap = rtl2832_sdr_enum_fmt_sdr_cap,
1197 .vidioc_g_fmt_sdr_cap = rtl2832_sdr_g_fmt_sdr_cap,
1198 .vidioc_s_fmt_sdr_cap = rtl2832_sdr_s_fmt_sdr_cap,
1199 .vidioc_try_fmt_sdr_cap = rtl2832_sdr_try_fmt_sdr_cap,
1200
1201 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1202 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1203 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1204 .vidioc_querybuf = vb2_ioctl_querybuf,
1205 .vidioc_qbuf = vb2_ioctl_qbuf,
1206 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1207
1208 .vidioc_streamon = vb2_ioctl_streamon,
1209 .vidioc_streamoff = vb2_ioctl_streamoff,
1210
1211 .vidioc_g_tuner = rtl2832_sdr_g_tuner,
1212 .vidioc_s_tuner = rtl2832_sdr_s_tuner,
1213
1214 .vidioc_enum_freq_bands = rtl2832_sdr_enum_freq_bands,
1215 .vidioc_g_frequency = rtl2832_sdr_g_frequency,
1216 .vidioc_s_frequency = rtl2832_sdr_s_frequency,
1217
1218 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1219 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1220 .vidioc_log_status = v4l2_ctrl_log_status,
1221 };
1222
1223 static const struct v4l2_file_operations rtl2832_sdr_fops = {
1224 .owner = THIS_MODULE,
1225 .open = v4l2_fh_open,
1226 .release = vb2_fop_release,
1227 .read = vb2_fop_read,
1228 .poll = vb2_fop_poll,
1229 .mmap = vb2_fop_mmap,
1230 .unlocked_ioctl = video_ioctl2,
1231 };
1232
1233 static struct video_device rtl2832_sdr_template = {
1234 .name = "Realtek RTL2832 SDR",
1235 .release = video_device_release_empty,
1236 .fops = &rtl2832_sdr_fops,
1237 .ioctl_ops = &rtl2832_sdr_ioctl_ops,
1238 .device_caps = V4L2_CAP_SDR_CAPTURE | V4L2_CAP_STREAMING |
1239 V4L2_CAP_READWRITE | V4L2_CAP_TUNER,
1240 };
1241
rtl2832_sdr_s_ctrl(struct v4l2_ctrl * ctrl)1242 static int rtl2832_sdr_s_ctrl(struct v4l2_ctrl *ctrl)
1243 {
1244 struct rtl2832_sdr_dev *dev =
1245 container_of(ctrl->handler, struct rtl2832_sdr_dev,
1246 hdl);
1247 struct platform_device *pdev = dev->pdev;
1248 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1249 struct dvb_frontend *fe = pdata->dvb_frontend;
1250 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1251 int ret;
1252
1253 dev_dbg(&pdev->dev, "id=%d name=%s val=%d min=%lld max=%lld step=%lld\n",
1254 ctrl->id, ctrl->name, ctrl->val, ctrl->minimum, ctrl->maximum,
1255 ctrl->step);
1256
1257 switch (ctrl->id) {
1258 case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
1259 case V4L2_CID_RF_TUNER_BANDWIDTH:
1260 /* TODO: these controls should be moved to tuner drivers */
1261 if (dev->bandwidth_auto->val) {
1262 /* Round towards the closest legal value */
1263 s32 val = dev->f_adc + div_u64(dev->bandwidth->step, 2);
1264 u32 offset;
1265
1266 val = clamp_t(s32, val, dev->bandwidth->minimum,
1267 dev->bandwidth->maximum);
1268 offset = val - dev->bandwidth->minimum;
1269 offset = dev->bandwidth->step *
1270 div_u64(offset, dev->bandwidth->step);
1271 dev->bandwidth->val = dev->bandwidth->minimum + offset;
1272 }
1273 c->bandwidth_hz = dev->bandwidth->val;
1274
1275 if (!test_bit(POWER_ON, &dev->flags))
1276 return 0;
1277
1278 if (fe->ops.tuner_ops.set_params)
1279 ret = fe->ops.tuner_ops.set_params(fe);
1280 else
1281 ret = 0;
1282 break;
1283 default:
1284 ret = -EINVAL;
1285 }
1286
1287 return ret;
1288 }
1289
1290 static const struct v4l2_ctrl_ops rtl2832_sdr_ctrl_ops = {
1291 .s_ctrl = rtl2832_sdr_s_ctrl,
1292 };
1293
rtl2832_sdr_video_release(struct v4l2_device * v)1294 static void rtl2832_sdr_video_release(struct v4l2_device *v)
1295 {
1296 struct rtl2832_sdr_dev *dev =
1297 container_of(v, struct rtl2832_sdr_dev, v4l2_dev);
1298 struct platform_device *pdev = dev->pdev;
1299
1300 dev_dbg(&pdev->dev, "\n");
1301
1302 v4l2_ctrl_handler_free(&dev->hdl);
1303 v4l2_device_unregister(&dev->v4l2_dev);
1304 kfree(dev);
1305 }
1306
1307 /* Platform driver interface */
rtl2832_sdr_probe(struct platform_device * pdev)1308 static int rtl2832_sdr_probe(struct platform_device *pdev)
1309 {
1310 struct rtl2832_sdr_dev *dev;
1311 struct rtl2832_sdr_platform_data *pdata = pdev->dev.platform_data;
1312 const struct v4l2_ctrl_ops *ops = &rtl2832_sdr_ctrl_ops;
1313 struct v4l2_subdev *subdev;
1314 int ret;
1315
1316 dev_dbg(&pdev->dev, "\n");
1317
1318 if (!pdata) {
1319 dev_err(&pdev->dev, "Cannot proceed without platform data\n");
1320 ret = -EINVAL;
1321 goto err;
1322 }
1323 if (!pdev->dev.parent->driver) {
1324 dev_dbg(&pdev->dev, "No parent device\n");
1325 ret = -EINVAL;
1326 goto err;
1327 }
1328 /* try to refcount host drv since we are the consumer */
1329 if (!try_module_get(pdev->dev.parent->driver->owner)) {
1330 dev_err(&pdev->dev, "Refcount fail");
1331 ret = -EINVAL;
1332 goto err;
1333 }
1334 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1335 if (dev == NULL) {
1336 ret = -ENOMEM;
1337 goto err_module_put;
1338 }
1339
1340 /* setup the state */
1341 subdev = pdata->v4l2_subdev;
1342 dev->v4l2_subdev = pdata->v4l2_subdev;
1343 dev->pdev = pdev;
1344 dev->regmap = pdata->regmap;
1345 dev->udev = pdata->dvb_usb_device->udev;
1346 dev->f_adc = bands_adc[0].rangelow;
1347 dev->f_tuner = bands_fm[0].rangelow;
1348 dev->pixelformat = formats[0].pixelformat;
1349 dev->buffersize = formats[0].buffersize;
1350 dev->num_formats = NUM_FORMATS;
1351 if (!rtl2832_sdr_emulated_fmt)
1352 dev->num_formats -= 1;
1353
1354 mutex_init(&dev->v4l2_lock);
1355 mutex_init(&dev->vb_queue_lock);
1356 spin_lock_init(&dev->queued_bufs_lock);
1357 INIT_LIST_HEAD(&dev->queued_bufs);
1358
1359 /* Init videobuf2 queue structure */
1360 dev->vb_queue.type = V4L2_BUF_TYPE_SDR_CAPTURE;
1361 dev->vb_queue.io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
1362 dev->vb_queue.drv_priv = dev;
1363 dev->vb_queue.buf_struct_size = sizeof(struct rtl2832_sdr_frame_buf);
1364 dev->vb_queue.ops = &rtl2832_sdr_vb2_ops;
1365 dev->vb_queue.mem_ops = &vb2_vmalloc_memops;
1366 dev->vb_queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1367 ret = vb2_queue_init(&dev->vb_queue);
1368 if (ret) {
1369 dev_err(&pdev->dev, "Could not initialize vb2 queue\n");
1370 goto err_kfree;
1371 }
1372
1373 /* Register controls */
1374 switch (pdata->tuner) {
1375 case RTL2832_SDR_TUNER_E4000:
1376 v4l2_ctrl_handler_init(&dev->hdl, 9);
1377 if (subdev)
1378 v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1379 NULL, true);
1380 break;
1381 case RTL2832_SDR_TUNER_R820T:
1382 case RTL2832_SDR_TUNER_R828D:
1383 v4l2_ctrl_handler_init(&dev->hdl, 2);
1384 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1385 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1386 0, 1, 1, 1);
1387 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1388 V4L2_CID_RF_TUNER_BANDWIDTH,
1389 0, 8000000, 100000, 0);
1390 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1391 break;
1392 case RTL2832_SDR_TUNER_FC0012:
1393 case RTL2832_SDR_TUNER_FC0013:
1394 v4l2_ctrl_handler_init(&dev->hdl, 2);
1395 dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, ops,
1396 V4L2_CID_RF_TUNER_BANDWIDTH_AUTO,
1397 0, 1, 1, 1);
1398 dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, ops,
1399 V4L2_CID_RF_TUNER_BANDWIDTH,
1400 6000000, 8000000, 1000000,
1401 6000000);
1402 v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
1403 break;
1404 case RTL2832_SDR_TUNER_FC2580:
1405 v4l2_ctrl_handler_init(&dev->hdl, 2);
1406 if (subdev)
1407 v4l2_ctrl_add_handler(&dev->hdl, subdev->ctrl_handler,
1408 NULL, true);
1409 break;
1410 default:
1411 v4l2_ctrl_handler_init(&dev->hdl, 0);
1412 dev_err(&pdev->dev, "Unsupported tuner\n");
1413 ret = -ENODEV;
1414 goto err_v4l2_ctrl_handler_free;
1415 }
1416 if (dev->hdl.error) {
1417 ret = dev->hdl.error;
1418 dev_err(&pdev->dev, "Could not initialize controls\n");
1419 goto err_v4l2_ctrl_handler_free;
1420 }
1421
1422 /* Init video_device structure */
1423 dev->vdev = rtl2832_sdr_template;
1424 dev->vdev.queue = &dev->vb_queue;
1425 dev->vdev.queue->lock = &dev->vb_queue_lock;
1426 video_set_drvdata(&dev->vdev, dev);
1427
1428 /* Register the v4l2_device structure */
1429 dev->v4l2_dev.release = rtl2832_sdr_video_release;
1430 ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
1431 if (ret) {
1432 dev_err(&pdev->dev, "Failed to register v4l2-device %d\n", ret);
1433 goto err_v4l2_ctrl_handler_free;
1434 }
1435
1436 dev->v4l2_dev.ctrl_handler = &dev->hdl;
1437 dev->vdev.v4l2_dev = &dev->v4l2_dev;
1438 dev->vdev.lock = &dev->v4l2_lock;
1439 dev->vdev.vfl_dir = VFL_DIR_RX;
1440
1441 ret = video_register_device(&dev->vdev, VFL_TYPE_SDR, -1);
1442 if (ret) {
1443 dev_err(&pdev->dev, "Failed to register as video device %d\n",
1444 ret);
1445 goto err_v4l2_device_unregister;
1446 }
1447 dev_info(&pdev->dev, "Registered as %s\n",
1448 video_device_node_name(&dev->vdev));
1449 dev_info(&pdev->dev, "Realtek RTL2832 SDR attached\n");
1450 dev_notice(&pdev->dev,
1451 "SDR API is still slightly experimental and functionality changes may follow\n");
1452 platform_set_drvdata(pdev, dev);
1453 return 0;
1454 err_v4l2_device_unregister:
1455 v4l2_device_unregister(&dev->v4l2_dev);
1456 err_v4l2_ctrl_handler_free:
1457 v4l2_ctrl_handler_free(&dev->hdl);
1458 err_kfree:
1459 kfree(dev);
1460 err_module_put:
1461 module_put(pdev->dev.parent->driver->owner);
1462 err:
1463 return ret;
1464 }
1465
rtl2832_sdr_remove(struct platform_device * pdev)1466 static void rtl2832_sdr_remove(struct platform_device *pdev)
1467 {
1468 struct rtl2832_sdr_dev *dev = platform_get_drvdata(pdev);
1469
1470 dev_dbg(&pdev->dev, "\n");
1471
1472 mutex_lock(&dev->vb_queue_lock);
1473 mutex_lock(&dev->v4l2_lock);
1474 /* No need to keep the urbs around after disconnection */
1475 dev->udev = NULL;
1476 v4l2_device_disconnect(&dev->v4l2_dev);
1477 video_unregister_device(&dev->vdev);
1478 mutex_unlock(&dev->v4l2_lock);
1479 mutex_unlock(&dev->vb_queue_lock);
1480 v4l2_device_put(&dev->v4l2_dev);
1481 module_put(pdev->dev.parent->driver->owner);
1482 }
1483
1484 static struct platform_driver rtl2832_sdr_driver = {
1485 .driver = {
1486 .name = "rtl2832_sdr",
1487 },
1488 .probe = rtl2832_sdr_probe,
1489 .remove_new = rtl2832_sdr_remove,
1490 };
1491 module_platform_driver(rtl2832_sdr_driver);
1492
1493 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
1494 MODULE_DESCRIPTION("Realtek RTL2832 SDR driver");
1495 MODULE_LICENSE("GPL");
1496
